Alaska is one of the two U.S. states not bordered by another state, Hawaii being the other. It is the only non-contiguous state in North America; about 500 miles (800 km) of Canadian territory separate Alaska from Washington. Alaska is thus an exclave of the United States that is part of the continental U.S. but is not part of the contiguous U.S. It is also the only mainland state whose capital city is accessible only via ship or air. No roads connect Juneau to the rest of the state.