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. Created when a national monument after three years became Lafayette National Park in 1919,[3] it was renamed Acadia in 1929[3] and is the oldest American national park east of the Mississippi River.
Two eastern Canadian national parks are older: Thousand Islands (1904) and Point Pelee (1918) in Ontario.[4]