Fort Stevenson State Park

Fort Stevenson State Park is a public recreation area located on a peninsula on Lake Sakakawea four miles south of the community of Garrison in McLean County, North Dakota. The state park's 586 acres include a partial reconstruction of Fort Stevenson, the 19th-century Missouri River fort from which the park takes its name. The site of the original fort lies about two miles southwest, below the waters of Lake Sakakawea.

Source: Wikipedia