Mansion on O Street's secret doors

The Mansion on O Street, home to the O Street Museum, is a private museum and event space in Dupont Circle noted for its many secret doors and hidden rooms that are part of its visitor tours. The museum advertises dozens of secret doors and locked rooms; these features are documented on the museum's official materials and discussed in guidebooks and press coverage. The building contains period furnishings, collections, and themed rooms that contribute to its reputation as a quirky local attraction.