O Street Museum - museum of hidden rooms and themed interiors

The O Street Museum (O Street Mansion) is a private museum and event space known for its maze of themed rooms, over 70 secret doors, and extensive collection of art, memorabilia, and vintage furnishings. The site is run by the O Street Museum Foundation and offers guided tours, private rooms for overnight stays, and cultural programming that appeals to local visitors seeking an offbeat museum experience. Its unusual layout and reservation-based tours make it a frequent recommendation among residents familiar with Georgetown’s lesser-known attractions.