The Mansion on O Street - themed rooms and secret-door installations

The Mansion on O Street at 2020 O Street NW is a private museum and hospitality venue known for its eclectic themed rooms, more than 100 decorated rooms, and a network of secret doors and passageways incorporated as part of its interior installations. The mansion operates guided tours and hosts collection-based installations of memorabilia, art, and historic decorative objects gathered by founder H.H. Leon. It functions as a distinctive house-museum and event space in Dupont Circle.