Arizona Commemorative Air Force Museum

A B-17G Flying Fortress sits on the tarmac at Falcon Field, and you can climb inside it, which is either thrilling or deeply clarifying about how uncomfortable the war effort was. This aviation museum at Mesa's working airport spans WWI through Vietnam, mixing warbirds like a B-25 and an F-4 Phantom with artifacts and memorabilia. The 30,000-square-foot hangar floor disappears fast once you're standing next to a MiG.