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The ever-innovative National Capital Planning Commission interactivity team has put together a nifty tool that maps not only the memorials you’ve heard about, but also the little plaques, lanterns, and statues to people and events otherwise lost to the mists of history (ever stopped to commemorate Maine’s lobstermen before?)

Though not user-generated like another artsy e-map we’ve mentioned, you can check in on Foursquare.