The Woodville Karst Plain is a 450-square-mile (1,200 km2) karst area that runs from Tallahassee, Florida, U.S. to the Gulf of Mexico separated by the Cody Scarp.
This karst plain includes numerous first magnitude springs, including Wakulla Springs, and the Leon Sinks Cave System, the longest underwater cave in the United States extending some 18 miles (29 km) and ranks #90 among the top 100 deepest caves in the world.[1] The WKP is home to five of the 27 reported species of troglobites in the Florida and South Georgia including Woodville Karst cave crayfish and Swimming Florida cave isopod. Also of interest are the Leon Sinks.[2]
On Dec 15, 2007, the connection between the Wakulla cave system and Leon Sinks cave system was made by members of the Woodville Karst Plain Project to create the Wakulla-Leon Sinks Cave System.[3] This connection established this as the longest underwater cave in the United States and the fourth largest in the world at a total of 28 miles (45 km) of surveyed passages.[3]