Boca Grande Lighthouse, at the southern tip of Gasparilla Island, Gasparilla Island State Park, Boca Grande, Lee County, SW Florida, USA. ^^^It was built in 1890 by the U.S. Lighthouse Service to mark the entrance into Charlotte Harbor from the Gulf of Mexico. It is the oldest building on Gasparilla Island and the most recognized landmark. It is also a museum of local history open to the public, known as the Boca Grande Lighthouse Museum.