Monroe County Tourist Development Council official website for the Florida Keys. Key Largo is the diving capital of the world. Key Largo has many wreck and John Pennekamp underwater park for snorkeling and diving. Fishing opportunities on the backcountry flats for bonefish, redfish, tarpon, permit and snook and deep sea offshore fishing for sailfish, wahoo, marlin and dolphinfish. Key Largo has accommodations ranging from waterfront resorts to comfortable bed and breakfasts.