Sieur de Monts Spring, at the entrance to Acadia National Park.

George B. Dorr, a conservation advocate, formed a corporation to buy and conserve land in the Mount Desert Island area. By 1913, the group had purchased some 6,000 acres, which it gave to the federal government. In 1916, this land became Sieur de Monts National Monument.

In 1919, it became Lafayette National Park, the first national park east of the Mississippi. In 1929, the park name changed to Acadia.