Rainbow Tropical Gardens: A Roadside Paradise in Boynton Beach

Rainbow Tropical Gardens: A Roadside Paradise in Boynton Beach

In the first half of the twentieth century, the coastal region of South Florida experienced rapid transformation. Railroads, highways, and the land boom of the 1920s brought new towns and tourism to areas like Boynton Beach. Along U.S. Highway 1, travelers encountered a landscape filled with nurseries, citrus groves, and small attractions that promoted Florida’s image as a lush, tropical destination. Among these, one of the most memorable was Rainbow Tropical Gardens, created and maintained by Clyde O’Brien Miller, a gifted horticulturist whose imagination and craftsmanship shaped the site into one of Boynton Beach’s earliest and most beloved landmarks.

Clyde O’Brien Miller and His Vision

Clyde O’Brien Miller was born in 1885 and developed an early interest in tropical plants and landscape design. He was part of a generation of horticulturists who viewed Florida not only as fertile ground for agriculture but also as a living canvas for artful gardens. Before establishing his own property, Miller worked on the gardens of Addison Mizner’s Cloister Inn in Boca Raton, where he absorbed Mizner’s use of Mediterranean Revival architecture and romantic garden design. This experience strongly influenced his later work.

By the late 1920s, Miller had settled in Boynton Beach and purchased land along U.S. 1 just north of downtown. He opened Rainbow’s End Nursery, which sold tropical plants and decorative landscape materials. Miller’s passion for creating beautiful spaces soon transformed the nursery into something larger. He began developing the grounds into Rainbow Tropical Gardens, a series of landscaped pathways, water features, and floral displays that showcased the variety and vibrancy of Florida’s tropical vegetation. Miller’s vision combined horticulture and art in a way that appealed to both tourists and local residents.

Design and Features

The gardens reflected Miller’s mastery of planting design and his appreciation for the visual power of color and form. He arranged winding footpaths that led through beds of hibiscus, crotons, bougainvillea, and palms. Visitors followed these trails past lagoons, fountains, and bridges, each carefully placed to frame the surrounding landscape. Stone gazebos, archways, and pergolas offered shade and a sense of discovery, while reflecting pools mirrored the vibrant foliage overhead.

At the front of the property stood Mediterranean Revival–style buildings that served as the gift shop and café. Local tradition and historical recollections suggest that Addison Mizner, who had already established himself as Palm Beach County’s most famous architect, either designed or inspired these structures. The combination of stucco walls, barrel tile roofs, and arched openings harmonized perfectly with the surrounding plantings.

Miller himself was responsible for much of the stonework and ornamental detailing throughout the grounds. His craftsmanship gave the gardens a handmade quality that distinguished them from purely commercial roadside attractions. Everything about the property reflected careful planning and artistic intent.

The Tourist Attraction Years

During the 1930s and 1940s, Rainbow Tropical Gardens became a celebrated stop for travelers driving the Dixie Highway and later U.S. 1. Visitors walked through the gardens, took photographs, and purchased tropical plants to ship north. The site appeared on linen postcards distributed across the country, often labeled with its motto, “All the Colors of the Tropics.” These colorful images helped spread Boynton Beach’s reputation as a place of natural beauty.

By the postwar years, Miller expanded the attraction to meet the expectations of modern tourists. The property included bird shows, alligators, and a Seminole Indian Village, reflecting the entertainment trends of the 1950s. Despite these additions, the heart of the gardens remained Miller’s landscapes and his commitment to horticultural display.

Rainbow Tropical Gardens also functioned as a community landmark. Local families held gatherings on the grounds, and the gardens served as a backdrop for countless photographs and wedding portraits. It represented the idealized Florida landscape that residents and visitors alike associated with sunshine, color, and abundance.

Florida map showing Rainbow Tropical Gardens

Decline and Transformation

By the late 1950s, the tourist economy of coastal Florida began to shift. The construction of the interstate highway system diverted travelers away from U.S. 1, reducing the steady stream of visitors who once stopped in Boynton Beach. Larger and more heavily advertised attractions, such as Cypress Gardens near Winter Haven, began to dominate the market. Like many independent roadside sites, Rainbow Tropical Gardens could not compete.

The property gradually closed, and much of the land was redeveloped. However, the main building, which had served as the garden’s entrance and café, survived. It was adapted for new use and today operates as Benvenuto’s Catering and Restaurant, a well-known Boynton Beach landmark. The restaurant retains many original architectural elements, including stucco walls, Spanish tile roofing, and arched porticos that date back to the garden’s early years.

The surrounding area became part of the Dos Lagos residential community, which occupies what was once the broader landscape of the gardens. Within that neighborhood, a few of the original garden structures still exist. Stone gazebos, walls, and fragments of pathways can still be found amid newer development, quietly preserving traces of Miller’s original design.

Remnant arch from Rainbow Tropical Gardens

Clyde Miller’s Legacy

Clyde O’Brien Miller’s work at Rainbow Tropical Gardens reflected his belief that horticulture was an art form capable of transforming the everyday environment. His skill as a gardener and builder made him one of Boynton Beach’s early creative figures. Although Miller was not trained as an architect, his collaboration with the Mizner aesthetic and his ability to blend structure and vegetation placed him within the larger tradition of Florida’s garden designers.

Miller’s influence extended beyond the physical site. His approach to tropical landscaping anticipated later trends in South Florida design, where color, texture, and native flora became central features of residential and public gardens. Even after the gardens closed, his example inspired other nurserymen and landscapers in the region.

Enduring Significance

Rainbow Tropical Gardens stood for three decades as a symbol of South Florida’s beauty and enterprise. It showcased the possibilities of tropical horticulture at a time when the region was defining its identity as a tourist paradise. The site’s history connects Boynton Beach to the broader story of Florida’s roadside culture and the individuals who shaped it through imagination and labor.

Although much of the original garden has vanished, the survival of Benvenuto’s Restaurant and several of Miller’s stone structures ensures that the spirit of Rainbow Tropical Gardens has not completely disappeared. For residents of the Dos Lagos community, the memory of the gardens remains embedded in the landscape itself.

Knollwood Groves: A Treasure of Memories

The story of Knollwood Groves begins in the early 1930s when the land was owned by Frederick Foster Carey and called Papaya Groves, Tranquility Farm. In 1933, the property was sold to Kenneth G. Smith, a Chicago businessman and president of the Pepsodent toothpaste company. Initially, Smith named the property the Amos and Andy Farm to align with Pepsodent’s sponsorship of the popular Amos and Andy radio show.

However, when the sponsorship ended, Smith renamed the property Knollwood Groves. Under its new name, Knollwood Groves flourished as a citrus grove and tourist destination, attracting visitors with its citrus tours, train rides, alligator wrestling shows, and a recreated Seminole Indian village. It was also known for its iconic apple pies, fresh-squeezed orange juice, and the unmistakable scent of orange blossoms that filled the air along Lawrence Road.

Knollwood Groves remained a beloved Boynton Beach landmark until 2005, when it closed due to increasing development pressures and the challenges of maintaining agricultural land in a growing urban area. The property was eventually sold and redeveloped into the Knollwood residential community.

Despite its closure, the legacy of Knollwood Groves endures in the fond memories of those who visited, worked, and grew up in Boynton Beach, offering a nostalgic glimpse into Florida’s agricultural past.

The following memories were compiled from posts made at the Boynton History Facebook page: 

Knollwood Groves was more than just an attraction on Lawrence Road—it was a beloved part of Boynton Beach’s history, filled with sights, scents, and experiences that left an indelible mark on generations.

“Knolly,” Knollwood Groves’ mascot painted on the side of the tram that transported visitors through the farm and old Florida hammock

The sweet, heady fragrance of orange blossoms greeted visitors, evoking a sense of joy and nostalgia. For many, it was a favorite destination for school field trips. First graders would marvel at the vibrant groves, with the tractor tour guide’s voice echoing phrases like “sweet carambola” during the tram rides. The trips were an annual tradition, offering wholesome fun and hands-on learning about citrus farming.

Knollwood’s famous apple pies were a highlight for many, their taste cherished long after the grove closed. Some still wish they had the recipe. Families visited regularly to pick up fresh fruit, homemade fudge, and even discounted “day olds” for juicing at home. Driving down Lawrence Road, the air filled with the aroma of oranges, was an experience in itself.

For locals, Knollwood Groves was also a workplace. In the 1960s, fruit packers, including one visitor’s mother, carefully prepared citrus for shipping. Others, like a sibling duo, assembled shipping boxes after school. In the 1970s, kids worked there, sneaking fresh oranges on occasion and feeling a deep connection to the land.

 

 

Memories of Martin Two Feathers, who performed alligator demonstrations and drove the tram, add a lively human touch to the grove’s story. It wasn’t just a place to buy fruit; it was a gathering spot where families bonded over fresh produce, apple pies, and the sights and sounds of a simpler time.

 

 

Knollwood Groves is missed by those who grew up in Boynton Beach, its legacy carried in fond recollections of orange-scented roads, school trips, and moments shared with loved ones.

The South Lake Worth (Boynton) Inlet History

SOUTH LAKE WORTH INLET (BOYNTON INLET) 

The Boynton Inlet, or what is officially known as the South Lake Worth Inlet, was a project that took many years to happen. Originally, Lake Worth was a fresh water lake. When the Palm Beach Inlet was opened in the 1800s, it changed to a salt water lagoon. At the far end

The Boynton Inlet

The Boynton Inlet

of the lake, the water was more brackish. Several cities used the lake to dump raw sewage. It was felt that making an additional opening to the sea would help “flush” the lake and to provide access for anglers and sport fishing.

The inlet was opened in 1927, and is a popular recreational spot for picnics and fishing.

The original article from March 17, 1927, announcing the inlet opening, from the Palm Beach Post.

CONNECTING CUT IS MADE AFTER YEARS OF ENGINEERING WORK

Scores Watch Ceremonial Labor at 11 o’clock Wednesday Night

At 11:18 o’clock last night the South Lake Worth Inlet at Boynton became a reality.

For at this hour waters from the Atlantic ocean glided in through the tiny cut, shoveled in the sand, and mingled with the waters of Lake Worth, for the first time at this point, filling the channel cut by a huge clam shell dredge. Dozens of spectators leaned from the bridge, which tops the project, and watched the operations by the glare of large search lights, while others tramped through the sand below to stand on the point to observe the laborers as they shoveled the opening wedge through which the ocean flowed.

Although about two weeks work yet remains for dredging the sand and cutting through part of the rock in the channel, last night’s task marked the official opening of the South Lake Worth inlet and the real termination of the project extending over a period of many years.

The South Lake Worth inlet, connecting the Atlantic ocean and Lake Worth, at a point just north of Boynton and the head of the lake, when completed will be available for pleasure craft, as well as being a vehicle for drainage. A depth of five feet at low tide will be increased to seven at high tide with a space of 154 feet between the two front jetties, and a 32 foot overhead clearance under the bridge.

Conceived in 1923, the project was almost one year in assuming definitive shape at the end of which time plans had been drawn, estimates made, the inlet district created and the project financed. The district extends from Southern Boulevard in West Palm Beach to a point one mile south of Boynton.

Riddle Brothers, engineers, were engaged to have charge of the entire projects, and last night both Karl and Kenyon Riddle of the firm, stood on the sands and watched the culmination of the $225,000 project, together with many of the town officials.

The concrete bridge, which has no draw, was completed August 1, 1924. Work started on the inlet proper in September, 1923, first on the solid concrete jetties, both of which withstood both hurricanes last summer without damage. The jetties, according to the engineering are of a peculiar construction, unique along the coast.

A suction dredge has been at work on the channel for some time and on Tuesday of this week the clam shell dredge began operations in a 21 hour-a-day schedule. It is expected that with the opening wedge cut, much of the sand will wash out to sea during high tides.

Lost Tourist Attractions

The Boynton Beach area was home to many well-known tourist attractions of the past. Sadly, these roadside stops no longer exist in today’s Boynton Beach.

James Melton’s Autorama – Located on US 1 in Hypoluxo, famous tenor James Melton displayed his extensive automobile collection to the public. Muralist Bernard Thomas painted a western themed mural in one of the museum halls. Mr. Melton’s untimely death in 1962 led to the closing of the museum. The property was sold and became a development.

Bianca’s Birds – This attraction on US 1 featured performing birds and a mock Seminole Indian village. Guests could dock boats or park on the premises. Later the property became a trailer park, then a residential development.

Knollwood Groves – Open from 1933 until 2005, this Lawrence Road attraction

Knollwood Groves

Knollwood Groves

featured citrus shipping, famous apple pies, a train ride through the groves and alligator wrestling and a hammock area with a recreated Seminole Indian village. It is now the Knollwood residential development.

Madison’s Jungle Garden – Located on Military Trail north of Gateway Boulevard, this tiny attraction was a rest stop for travelers. Several animals were on display in a small zoo. The Madisons made items to sell to the tourists such as orange blossom perfume, palmetto hats and pepper hot sauce.

Palm Beach Groves – Operated for decades by the Shelton Family, this attraction featured a tour of the groves, sausage trees and an extensive store for Florida produce and souvenirs. Its peacock flock survives in the nearby Fox Hollow neighborhood.

Rainbow Tropical Gardens – This beautiful garden on US 1 featured beautiful landscaping and lagoons with small fancy buildings throughout the property. The main building is today’s Benvenuto Restaurant, while the back of the property is a residential development. A few of the small garden structures survive on private property.

Waite’s Bird Farm – Located on US 1 north of Boynton Beach, this attraction was originally the Lewis Bird Farm.  Howard and Angela Waite owned and operated the zoo and pet shop. It featured trained birds, alligators, monkeys and other animals, and birds were raised and sold as pets. The building still stands with a different occupant.

Legend of the Boynton Caves

LEGEND OF THE BOYNTON CAVES

Postcard image with Charles Leon Pierce, son of barefoot mailman Charlie Pierce, at the cave’s entrance, ca. 1910

Mention the Briny Breezes area caves to local old timers, and the stories begin—Tales of pirates, hidden treasure, skeletons, boot-leggers, and Al Capone surface.

Many Tourists Visit the “Caves” of Delray (24 Feb 1920, The Palm Beach Post)

 

The Confederate Army hid in the connecting caves (Dillon), local children played in them, motorcycle gangs rode up from Miami to see them, the barefoot mailman took refuge and slept in them, and teenagers followed the underground caverns into nearby mansions basements to raid wine cellars.

 

Lyman Boomer’s map of the Boynton area as he remembered it as it was in 1910 (he noted “to the Old Cave” on the far left).

Naturalist and illustrator Lyman Boomer mentioned the caves on his map depicting Boynton in 1909-1910.

Sailor Jim’s Cave by Pat Enright

 

Delray author/illustrator W.J. Pat Enright, who moved to Delray in the 1930s, coined the cave “Sailor Jim’s Cave” with his 1951 adventure novel about a mystery of buried treasure in Florida. Enright’s juvenile fiction title is available to read free on Archive.org. The author describes the old hermit’s coastal cave dwelling beginning on page 110.

 

Delray Cave Inspires Noted Cartoonist
(5 Nov. 1951, The Miami News).

 

Although archaeological evidence proves that the mysterious caves were in today’s Gulf Stream (south of Gulf Stream beach), generations of people who grew up in coastal Boynton/Delray remember the rocky outcroppings and underground caverns accessible at low tide, but many have trouble remembering where they were.

 

Bluffs along the Atlantic coast in Manalapan (ca. 1920, A. Roman Pierson).

 

Located below a dune overlooking the Atlantic Ocean, the caves are about midway between Boynton and Delray Beach, south of Briny Breezes.

Roadside sign on South Ocean Blvd.

 

Long before luxury residences and condominiums lined much of Ocean Blvd., the vast beaches with rocky overlooks were an unobstructed paradise and veritable playground for locals and visitors.

Century-old newspapers mention the caves as tourist attractions, and a real photo postal card mailed in 1910 depicts Chuck Pierce, son of famed pioneer barefoot mail carrier Charlie W. Pierce, posing outside of such coastal caverns.

Palm Beach County archaeologists Dorothy Block and Chris Davenport are familiar with the cave. Davenport told me the Florida Master Site File lists the location as Boynton Cave.  Block maintained the Boynton Cave (dwelling site) hails from the Glades I through the Historic period and represents one of 30 coastal Palm Beach County archaeological sites.

Prehistoric native Americans, probably the Jeaga, lived in them, used the rock slabs as tables, and left ancient artwork and messages on the ceilings. Anthropologist John M. Goggin described the cave as he found it in 1949:

A large cave in a coquina outcropping faces the old beach road. One entrance is only a couple of feet east of the road, the major entrance is no more than twenty feet from the road. This entrance, about twenty-five feet long and three to four feet high, opens into the largest of two connecting chambers. This room, about thirty-five feet wide slopes steeply down from the entrance, with the lowest part of the floor about nine or ten feet below the roof at the entrance…The ocean beach is only about 200 feet or less to the east of the cave entrance…Both the cave and the surrounding area have served as Indian camping spots as evidenced by sherds…Further evidence of Indian occupancy is a large painting on the roof of the main chamber. This is composed of several simple motifs painted in burnt sienna color (Goggin, 1949, 376-377).

WHAT HAPPENED TO THE CAVES?

Site of the old Gulfstream Polo Fields on the Atlantic Ocean
1. Caves in the coral rock

According to a local on our Facebook page, Dennis Evangelist, a Bank of America banker built his house on the cave site in the late 1960s/early1970s. Evangelist recalled: “We rode our bikes over the Eighth Street bridge from the Lake Ida area to the Boynton Inlet to catch catfish and would stop by the cave to look around and sometimes snorkel.” Another cave entrance was reportedly barricaded in the early 2000s when a house above it collapsed while digging a swimming pool.

Blowing Rocks Nature Preserve, Jupiter, Florida

With the entrance sealed up and houses over the caves, it’s easy to dismiss the subterranean Boynton Caves as an urban legend. However, those familiar with the Florida coast know that caves existed along the beach’s ridge. Even the famed Boynton Oceanfront Hotel was built on a coastal ridge. Hence, the names Ocean Ridge and Highland Beach.

If you’ve ever been to Jupiter’s Blowing Rocks Nature Preserve, you can see its limestone outcropping with its solution hole spouts. Travel west, and the old coastline of 10,000 years ago can be recognized by a crest of higher land about a mile inland (High Ridge Road).

Cave Location

 

My husband and I rode bikes through Gulf Stream and marveled at the rocky ridges bordering some of the neighborhood’s most attractive homes. Across from Gulf Stream school is a public beach access (we had to walk the bicycles).

 

 

Once you enter the beach area, look north, and notice the large, partially submerged rock formation. The underground cave is below and to the west. If you are at Gulfstream Park, walk south on the beach to find the outcropping.

 

East entrance to the Boynton Cave (now sealed off)

 

REFERENCES

Block, Dorothy. (2023). Three Thousand Years in Paradise: Coastal Archaeology in Central Palm Beach County. Vol. 76, No. 2 The Florida Anthropologist.

Dillon, Rodney, (1982 October 24) Confederates Escape off Southern Palm Beach County. Fort Lauderdale News).

Enright, Walter J. Pat. (1951). Sailor Jim’s Cave: A Mystery of Buried Treasure in Florida. Dodd Mead, New York. Internet Archive. Sailor Jim’s cave : a mystery of buried treasure in Florida : Enright, Walter J. Pat, 1879- : Free Download, Borrow, and Streaming : Internet Archive

Florida Division of Historic Resources. (2024). Florida Master Site File Florida Master Site File – Division of Historical Resources – Florida Department of State

Goggin, John M. (1949). Archeology of the Glades Area, Southern Florida. P.K. Yonge Library of Florida History, Gainesville.