S. Dillon Ripley Center, Underground museum in United States of America
The S. Dillon Ripley Center is an educational and exhibition area located on the National Mall.
Named after the Smithsonian Institution's Secretary from 1964 to 1984, S. Dillon Ripley.
Houses the International Gallery, which hosts traveling art exhibitions.
The center features a conference room, lecture hall, and the Smithsonian Associates offices.
Known for its small entrance pavilion, leading to a larger underground facility.
Location: Washington, D.C.
Website: si.edu/Museums/ripley-center
Source: Wikimedia