I love this stuff. For two that are closer to home, get on GoogleEarth and check out the pedestal of the Statue of Liberty. It was originally a star fort. There's another on another island just east of Liberty Island. (Sorry, the names escape me.) Also, Den Helder in Holland. Havana, Cuba. Thanks for the post.
I'm not so sure the French one is messed. I think the city grew and the outer walls/ trenches might have been torn down/filled in.
google map (via satellite view) Naarden, Netherlands (Holland). It's a super cool fort/town... been there in person.