Enjoy the view from the top of the tower near the campground at Cape Henlopen State Park. The towers were built from 1939 to 1942, the 11 cement observation towers along Delaware’s coat were built to protect the shores during World War II – and to last about 20 years. They are still standing after 60 years. The towers were the eyes for the guns of Fort Miles, located in what in now Cape Henlopen state park. Abandoned since the early 1960s, these sentinels once stood guard against German ships and U-boats.