This is the famous TNT area of Point Pleasant, West Virginia. During World War II the area of more that 8,000 acres was used for ammunition manufacturing. For safety reasons and to hide it, the ammunition and explosives were hidden in the concrete igloos. After the war, the area was mostly abandoned. Then in the late 1960s the world famous cryptid Mothman we all know and love was said to have been seen here.
We did a video where we explored the TNT area by the land and water you can watch it here: