
If you're in or near New York, Governor's Island is a really fascinating place to spend a day. It's got an otherworldly feel to it, just off the tip of lower Manhattan, but completely isolated and filled with abandoned but well-maintained military buildings, including a fort. The best part though is you can rent incredibly dorky 4 person bicycle cars! (The last page of the TAD book shows us in one from a couple of years ago). More about Governor's Island here.