Few international airports have an on-airport hotel but JFK will get one in 2018. The TWA Flight Center Hotel will be located near JetBlue's Terminal 5 and it will be a nice homage to the iconic airline. TWA, that is.
Meanwhile, the Delta Air Transport Heritage Museum, located at Delta headquarters in Atlanta, doesn't get much publicity, but features dozens of vintage aircraft in a former hangar, and is definitely worth a visit.