The National Capital Planning Committee’s interactive map Memorials in Washington DC went live recently. The map uses information from Washington as Commemoration, a joint research project undertaken by the NCPC and the National Park Service. Clicking on a memorial leads to an individual entry denoting the site’s “full history and significance.” Visitors to the site can explore the memorials by name, but location on the map, or by subject theme. Foursquare users can check in at memorials, upload photos and leave tips for their friends. As an added bonus, the most frequent foursquare visitor to a memorial becomes “Mayor.” The site is a work-in-progress, with a goal of plotting and describing every D.C. memorial, present and planned.