Just minutes from the White House, Embassy Row, and Dupont Circle, O Museum in the Mansion — THE Secret Door Museum offers one of the most inspiring experiences in the nation’s capital. With over 100+ rooms, 80+ secret doors, immersive themed exhibits, and one of the most unique fun collections of artifacts in the country, this celebrated historic mansion invites visitors to explore at their own pace — sparking curiosity, creativity, and reflection through eclectic exhibits and powerful storytelling.

🎥 Watch: A Hidden World Awaits. Peek inside the O Museum’s maze of secret doors, immersive rooms, and unforgettable exhibits. 

A favorite among families, couples, tour groups, and international visitors, O Museum offers something for every curious explorer — from rare historical artifacts to music memorabilia and one-of-a-kind interactive experiences. Whether you’re visiting DC for the first time or rediscovering its treasures, this unique destination is not to be missed.

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Unlock the Secrets of O Museum in the Mansion – Hidden Doors, Art, Music, Sports Science, and History in the Heart of DC