As my kids will tell you (complain actually) I have a fascination with forts and other defensive structures. I can't really say why but I do. I have taken pictures of many and have posted some in Flickr, I have also posted some rules and the cards I made for my Castle Seige game.
You can find the rules etc at the Koningsberg1918 section, just search under "people", it should pop up.
Search under daftrica89 and you will find shots of Fort Wilkins (at the northernmost tip of Michigan and some other of Fort Clinch (near Jacksonville Florida) there are some other pictures in there as well.
I will try to post the Fort Pulaski photos as soon as I can get around to it.