Favorite Army Museum?

Just visited the Fort Riley 1st ID Museum and Cavalry Museum last week. They were small, but really excellent collections and lots of fun history. Got a great tour by the curator and he talked all about building the displays–imported Iraqi trash and a WW2 Jeep on the second floor of the original post hospital were fascinating stories. Also, a hat that was owned by General Custer.

What are your favorite museums? Not necessarily the "best" but favorites. Any little gems hidden around your post?

I'll take a novelty water bottle from the gift shop and fill it up on my way out.