Locations and Hours
National Academy of Sciences Building
2101 Constitution Ave., N.W., Washington, D.C.
Hours: 9 a.m. to 5 p.m. on weekdays. Photo ID required. Closed weekends and holidays.
Requirements: Photo ID and proof of up to date COVID-19 vaccination. No reservations required.
For more information about current COVID-19-related vaccination requirements and our operating status, please visit this webpage.
Register for special Wednesday tours here.
Directions to the NAS Building
NAS Building Visitor's Guide
The Einstein Memorial Visitor's Guide
NAS Great Hall Website
500 Fifth St., N.W., Washington, D.C.
Hours: Lobby accessible to the public 9 a.m. to 5 p.m. weekdays. Photo ID required. Closed weekends and holidays.
Keck Lobby Brochure