Museo postale nazionale
Consigliato da 26 persone del luogo,
Consigli della gente del posto
Lesser known Smithsonian museum with interesting exhibits for all ages; very family friendly. Located next to Union Station.
My sleeper pick for must see museums. You get a lot of info about stamps and the postal service, but you can walk away with your very own set of stamps as well. Very kid friendly.
The closest Smithsonian museum, with a massive and surprisingly fun collection of stamps and delivery vehicles. Free and open daily 10 am - 5:30 pm.