Sunken Gardens — St. Petersburg, Florida

Sunken Gardens occupies approximately four acres at 1825 4th Street North in the Old Northeast neighborhood of St. Petersburg, Florida. The site sits in a natural depression approximately fifteen feet below street level — a micro-topographic feature that creates a distinctive tropical microclimate within the city's broader subtropical setting. The Sunken Gardens Forever Foundation documents the presence of more than 50,000 exotic tropical plants on the grounds, including live oaks, magnolias, rainbow eucalyptus, plumeria, palms, bamboos, and heliconias. The City of St. Petersburg describes it as the city's oldest operating botanical attraction. The Advisory Council on Historic Preservation identifies Sunken Gardens as one of the oldest roadside tourist attractions in the United States, a distinction rooted in more than 120 years of continuous history at the same address.

The story of Sunken Gardens begins in 1902, when George Turner Sr., a plumber by trade, purchased 4.1 acres of land on what was then the edge of a young St. Petersburg. According to the Sunken Gardens Forever Foundation, the parcel contained a sinkhole, and Turner applied his plumbing expertise to drain it — exposing a basin of land roughly fifteen feet below the surrounding street grade. He then began cultivating tropical fruit trees in the resulting sheltered depression, where the lower elevation and accumulated moisture produced growing conditions more lush than the surrounding landscape.

By the early 1920s, the gardens had grown sufficiently distinctive that Turner began charging admission for tours of the grounds. The property formally opened to the public as an attraction between 1935 and 1936, according to the Sunken Gardens Forever Foundation. The adjacent commercial building at the same address — constructed in 1926 as the Sanitary Public Market — predates the formal public opening and would later become a significant part of the site's historic fabric. The St. Pete Catalyst documents that this 1926 building was subsequently listed on the National Register of Historic Places in 2002 and now houses the gardens' entrance and gift shop.

Turner's decision to develop the drained sinkhole as a horticultural showcase placed Sunken Gardens within a broader tradition of Florida roadside attractions that flourished in the early and mid twentieth century, as automobile tourism expanded access to the state's interior and coastal communities alike.

From the 1950s through the 1970s, Sunken Gardens drew more than 200,000 visitors per year, according to the Sunken Gardens Forever Foundation, ranking it among Florida's most prominent roadside attractions during that era. The gardens were known not only for their dense botanical plantings but also for a resident animal collection that included flamingos — a feature the site maintains to the present day. In 2016, twenty young Chilean flamingos joined the gardens, supplementing the long-established flock, as documented by the Sunken Gardens Forever Foundation.

The official Sunken Gardens history page describes the site's role in Florida's tourism industry as documented through archival photographs, moving footage, and historical records now displayed in the History Center, which occupies the restored 1940 entrance building. That History Center opening marked a deliberate effort to preserve the interpretive record of the gardens alongside their living plant collection. The grounds encompass horticultural programming, docent-led garden tours, and community events including yoga and horticulture classes, as noted by the official site.

The decades of peak visitation gave way to financial decline by the 1990s, as competition from larger theme parks and changing tourism patterns reduced attendance at smaller, independently operated roadside attractions across Florida.

In 1998, the City of St. Petersburg designated Sunken Gardens a local historic landmark. The following year, in 1999, the city purchased the property — including the 1926 Sanitary Public Market building — from the Turner grandsons for $3.8 million, with the acquisition funded through a voter-approved tax, according to the St. Pete Catalyst. That transaction transferred stewardship of a working botanical collection, a historic commercial building, and nearly a century of accumulated horticultural development into public hands.

In 2002, the 1926 Sanitary Public Market building was added to the National Register of Historic Places, as documented by the St. Pete Catalyst. The City of St. Petersburg continues to operate the gardens directly, with the Sunken Gardens Forever Foundation — a private nonprofit — providing supplementary support through fundraising, as described by the St. Petersburg Chamber of Commerce. The City of St. Petersburg announced the opening of the History Center in the restored 1940 entrance building, framing it as an effort to document the gardens' contribution to Florida's wider tourism industry through archival materials including photographs, documents, and footage.

Sunken Gardens occupies a particular position in St. Petersburg's civic identity as a site that predates most of the city's other cultural institutions. The land was first cultivated by George Turner Sr. in 1902 — a decade after the city's incorporation on February 29, 1892, as documented by the City of St. Petersburg — and the gardens were drawing hundreds of thousands of visitors annually before the construction of Florida's major theme parks. The Advisory Council on Historic Preservation identifies the site among the city's defining landmarks.

The gardens sit within the Old Northeast neighborhood, physically removed from the downtown waterfront corridor that includes the Salvador Dalí Museum and Straub Park, and they represent a different strand of the city's cultural history: one rooted in early-twentieth-century horticultural entrepreneurship and Florida's roadside tourism economy rather than in the arts-institution growth of recent decades. The voter-approved funding for the 1999 city purchase reflects a documented public determination to maintain the site as a civic asset rather than allow it to close or be redeveloped. As of 2026, the City of St. Petersburg operates the gardens, the Sunken Gardens Forever Foundation supports ongoing programming, and the 1926 Sanitary Public Market building stands on the National Register of Historic Places — three distinct layers of institutional investment in a site that began as one plumber's experiment with a drained sinkhole.