Visit the 1899 observatory and enjoy a self-guided walking tour of the park. Weather permitting, solar observations. Sunday: guided tours at 1pm & 2:30pm including the history of the National Geodetic Survey work at the site.
Free
Phone: 301-258-6160
2018/06/23 - 2018/06/24
Observatory Park
100 DeSellum Avenue, Gaithersburg, MD 20877
Other accommodations can be made with advance notice.