Undersea Highway

Undersea Highway in Key Largo sits off the Florida Keys where the ancient Overseas Highway (U.S. 1) lies close to the reef system. The site is a shallow, sandy shelf edge and rubble zones along the edge of the reef, with access from local beaches and charter boats. Divers typically descend to moderate depths with clear visibility and look for the diverse Western Atlantic reef life that thrives around Florida’s corals—groupers, snapper, moray eels, and a variety of reef fish. The site is suitable for drift entry along current edges or calm-water depth checks, and is commonly visited as part of a broader Keys dive itinerary. Always follow local currents and protected-reef guidelines.