International Spy Museum is a real time commitment — fit it in only if it's a priority.
Allow 2–3 hrs.
Genuinely fun and hands-on — you get a cover identity, real gadgets and Cold War tradecraft, and kids and teens love it. The honest catch: in a city overflowing with world-class free museums, paying $30+ feels steep, and serious history buffs may find it leans theme-park.