Acadia National Park is a national park located in the U.S. state of Maine. It reserves much of Mount Desert Island, and associated smaller islands, off the Atlantic coast. Initially created as the Sieur de Monts National Monument in 1916, the park was renamed Lafayette National Park in 1919, and was given its current name of Acadia in 1929. The oldest American national park east of the Mississippi River, its landscape is marked by woodland, rocky beaches and glacier-scoured granite peaks such as Cadillac Mountain, the highest point on the United States’ East Coast. The bayside town of Bar Harbor, with restaurants and shops, is a popular gateway.