The Mansion on O Street (O Street Museum Foundation)

The O Street Museum Foundation operates a museum and event space in a restored Dupont Circle mansion at 2020 O Street NW. The site contains dozens of themed rooms and more than 100 rooms and suites, and is noted for numerous hidden doors and secret passages incorporated into the interior. The museum houses a large collection of art, music, and literary memorabilia and offers guided tours and reservation-based stays.