Fort Miles is an American military installation located on Cape Henlopen near Lewes, Delaware. In 1941, the fort was constructed by the government during World War II to guard the Delaware Bay and River from Axis submarines. Observation towers, four to five story round-base concrete towers with flat observation decks, were set up in triads to triangulate the position of suspicious ships or submarines. Many bunkers were also constructed to house cannons and other weapons. Barracks, administration buildings, and a pier were also constructed as part of the fort. Fort Miles never saw any major action, only firing its cannons once between its establishment and the end of the war. In 1964, 543 acres of federal land were donated to begin the Cape Henlopen State Park. Over time, more land was transfered to the state park until Fort Miles ceased operation altogether in the early 1990s. Cape Henlopen is the southern cape of the Delaware Bay along the United States. ... Location within the British Isles. ... State nickname: The First State Other U.S. States Capital Dover Largest city Wilmington Governor Ruth Ann Minner Official languages None Area 6,452 km² (49th)  - Land 5,068 km²  - Water 1,387 km² (21. ... Mushroom cloud from the nuclear explosion over Nagasaki rising 18 km into the air. ... Delaware Bay Delaware Bay is a large esturarial inlet of the Atlantic Ocean at the mouth of the Delaware River along the coast of the United States. ... The Delaware River at New Hope, Pennsylvania The Delaware River is a river on the Atlantic coast of the United States. ... Cape Henlopen is the southern cape of the Delaware Bay along the United States. ...