If you’d like to visit an honest-to-goodness Cold War landmark, visit Au Pied de Cochin (sp?–my french is terrible–"Foot of the Pig"). This is where a Soviet double-agent, who had convinced his CIA handlers that he was on our side, slipped out of a small bathroom window out onto Wisconsin Ave, and then sprinted up the street to the then-Soviet embassy. There is a small plaque on the wall, but only a real local can give you all the details. Not terrible food either, if you’re hungry at 3am. Wisconsin and Prospect Streets in Georgetown.