ey Largo, where the highway jumps onto the Florida Keys and becomes the Overseas Highway. You've now officially left the mainland behind, and you're headed into Paradise. Here you'll find the spectacular underwater marine park known worldwide, John Pennkamp Coral Reef State Park. Divers know this is one of the world's best dive spots, with crystaline waters and living coral reef just offshore. No diver can resist the perfect conditions created by the nearby Gulf Stream. Dive shops and resorts with their colorful red dive flags remind you that scuba is king here, and the reef is just minutes away by boat.