[QUOTE]what these are?/[QUOTE]
They look a lot like the light houses we have on the southern Chesapaeke. These are clearly military. Our light houses have a cast iron cylinder base instead of the tripod bases. We have some that the house part is brick too.
They recently sold off a couple near here to private parties. I think a few went cheap but turning them into a habitable place isn't easy or cheap. Some are a few miles from land.
Wolf Trap Light
Wolftrap and Thimble Shoals were sold. The little structure to the right on Wolftrap is the out house. I sailed by it just last Sunday.