This World War II bunker served as a gun emplacement, with round turrets on either side that held 6-inch guns. The horseshoe-shaped structures visible out front at low tide are Panama mounts, built in 1941 before the more permanent bunker and used for four 155mm coast artillery guns. A sister bunker stands across the bay in Lewes, Delaware. When this bunker was built in 1942, it was covered with sod and stood on high ground 900 feet from the ocean. Built of reinforced concrete, it has a roof and walls 6 feet thick. Erosion and storms have washed away the land in front of and beneath it, leaving pilings meant only for stabilization to support a bunker weighing thousands of tons.