Acadia National Park, on Mount Desert Island, off the coast of the U.S. state of Maine, was created in part by land and other donations by John D. Rockefeller Jr. Between 1919 and 1931, Rockefeller, who was opposed to the introduction of automobiles on the island, personally oversaw the construction of a network of carriage roads, closed to motorized vehicles, on the eastern half of the island, including sixteen granite bridges and two gatehouses. The major portion of this network now falls within the bounds of the national park, and was listed on the National Register of Historic Places in 1979.