Open weekends, plus some weekdays in summer. Washington Union Station has been beautifully restored after some tough times in the 1970s and early 80s. The station also houses many retail stores, restaurants, and movie theaters. Alas, only the long platforms hint at its former glory. MARC trains still stop here, but the station closed recently.
Efforts are underway to preserve the building.
You can find the station a few blocks southeast of the Silver Spring Metro stop, where the railroad tracks cross Georgia Avenue. The station retains a rural feel, even though the location is now heavily suburbanized. MARC trains continue to stop here. Rockville was forced to relocate its Gothic brick station for Metro construction in the 1980s. The 1873 station is a short distance south of the Metro station on the west side of the tracks.