Overseas Highway to Key West

America's most scenic ocean crossing, the 113-mile Overseas Highway arcs across 42 bridges including the iconic Seven Mile Bridge, with turquoise waters on both sides. At nearly twice the length of Hana Highway's 64-mile journey, it offers endless water vistas from Miami to Key West, passing through Key Largo and Marathon. Watch for dolphins and pelicans; the sunsets at Mallory Square are legendary.