With its turn-of-the-century rowhouses, grandiose 19th-century embassies and retro government buildings, D.C. already looks, well, old. But to truly zap back in time, take a look at these vintage postcards, from New Deal-era political ones to delightfully sepia-toned street scenes — plus a surprising number of hotel shots. -Jenn Barger
· Cornerspotted: Forrest Hall, Home of the Georgetown Gap [CDC]
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