Key Largo - The Dive Capital Key Largo, the city, made famous by the movie that Humphrey Bogart and Lauren Bacall starred in, is the dive capital of the world. Key Largo is home to the world’s largest artificial reef, the 510 foot USS Spiegel Grove. This luxurious Florida vacation spot is a slight drive from the mainland of Florida but is an existence by itself. Key Largo has been the setting of movies, including Key Largo and... Learn more about Key Largo