Cape Sable, Florida is the southern most point of the US mainland and mainland Florida. It is located in southwestern Florida, in Monroe County, and is part of the Everglades National Park. The cape has many lakes and some magnificent beaches. The cape is home to the diamondback terrapin and the gopher tortise. More than 3,000 Cape Sable seaside sparrows use the cape. ... State nickname: Sunshine State Official languages English Capital Tallahassee Largest city Jacksonville (largest metropolitan area is Miami) Governor Jeb Bush (R) Senators Bill Nelson (D) Mel Martinez (R) Area - Total - % water Ranked 22nd 170,451 km² 17. ... State nickname: Sunshine State Official languages English Capital Tallahassee Largest city Jacksonville (largest metropolitan area is Miami) Governor Jeb Bush (R) Senators Bill Nelson (D) Mel Martinez (R) Area - Total - % water Ranked 22nd 170,451 km² 17. ... Location in the state of Florida Formed 1823 Seat Key West Area - Total - Water 9,679 km² (3,737 mi²) 7,097 km² (2,740 mi²) 73. ... Everglades National Park is a U.S. National Park which preserves the southern portion of the Everglades (all south of Tamiami Trail), but represents only 20 percent of the original wetland area. ... The Diamondback terrapin (Malaclemys terrapin) is the State Reptile of the U.S. state of Maryland. ... For the Sparrow air-to-air missile, see AIM-7 Sparrow. ...