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-Leon Sinks Cave System, the longest surveyed underwater cave in the United States extending 32 miles (51 km) and ranking #57 among the top 100 longest caves in the world. The WKP is home to five of the 27 reported species of troglobites in Florida and South Georgia including Woodville Karst cave crayfish and Swimming Florida cave isopod. Also of interest are the Leon Sinks.