011 - United States

Acadia National Park preserves much of Mount Desert Island, and associated smaller islands, off the Atlantic coast of Maine. Traditionally inhabited by Wabanaki Native American hunters, fishers, and gatherers, the area includes mountains, an ocean shoreline, woodlands, and lakes. In addition to Mount Desert Island, the park comprises much of the Isle au Haut, a small island to the southwest of Mount Desert Island and parts of Baker Island, also nearby. A portion of Schoodic Peninsula on the mainland is also part of the park. In total, Acadia National Park consists of 30.300 acres (47 square miles or 123 km²) on Mount Desert Island, 2.728 acres (4,6 square miles or 11 km²) on Isle au Haut and 2,366 acres (3,5 square miles or 9,2 km²) on the Schoodic Peninsula.

In the fall of 1604, Samuel de Champlain observed a high-notched island composed of seven or eight mountains rising to bare-rock summits from slopes of birch, fir, and pine. In spite of many changes over nearly 400 years, the area remains essentially the same.
The park was created by President Woodrow Wilson, as Sieur de Monts National Monument on July 8, 1916, administered by the National Park Service. On February 26, 1919, it became a national park, with the name Lafayette National Park in honor of the Marquis de Lafayette, an influential French supporter of the American Revolution. The park's name was changed to Acadia National Park on January 19, 1929.