As far as we know, Ponce de Leon was the first European to "discover" Florida. His voyage, in 1513, was important for other discoveries, as well.

On that voyage Ponce discovered the Bahama Channel, which would provide a shorter route between Cuba and Europe. His pilot, Anton de Alaminos, was the first to make note of the strong current off Florida's south coast and is generally acknowledged to be the discoverer of the Gulf Stream.