Key West is a city in Monroe County, Florida, United States. The city encompasses the island of Key West, the part of Stock Island north of U.S. 1 (east), Sigsbee Park (north, originally known as Dredgers Key), Fleming Key (north), and Sunset Key (west, originally known as Tank Island). Both Fleming Key and Sigsbee Park are part of Naval Air Station Key West and are inaccessible by civilians. Key West is the county seat of Monroe County. Key West is known as the southernmost city in the Continental United States. It is also the southern terminus of U.S. 1, State Road A1A, the East Coast Greenway and before 1935, the Florida East Coast Railway. Key West is 129 miles (207 km) southwest of Miami, Florida, (about 160 driving miles) and 106 miles (170 km) north-northeast (21.2 degrees) of Havana, Cuba. Cuba, at its closest point, is 94 statute (81 nautical) miles south.