1100 Jefferson Drive, S.W. Washington, D.C.
The S. Dillon Ripley Center is located 100 yards east of the Smithsonian Metro station, Mall exit. The Center is underground and is accessed by a copper domed kiosk on Jefferson Drive between the "Castle" and the Freer Gallery of Art and taking the elevator down 3 floors.
Walk past the escalator to the event rooms on the left and right of the hallway.