You need to get a timed pass for each guest to enter

Take red line from Rockville Station to Cleveland Park. Exit to your right, and follow Conneticut Ave, to the Zoo. 11 mins

Take the red line from Rockville Station to Metro Center. Exit at ENTRANCE C - 12TH ST & F ST and walk .05 miles, 18 mins

Take the red line from Rockville Station to Metro Center. Exit at ENTRANCE C - 12TH ST & F ST and walk .05 miles, 18 mins

You will need a timed pass to enter

Take red line from Rockville Station to Gallery Place/Chinatown and Exit station at ENTRANCE A - 7TH ST & F ST and walk 0.8 miles, 26 mins

or

Take red line from Rockville Station to Gallery Place/Chinatown. Transfer to green line towards Branch Ave. Get off at L'enfant Plaza

Walk - 11 min - 0.3 miles

Exit station at EXIT A - 7TH ST SW & MARYLAND AVE SW to destination

Take red line from Rockville to Gallery Place/Chinatown.

Exit station at ENTRANCE A - 7TH ST & F ST and walk 0.5 miles 18 mins.

Lots of walking and monuments to see

Lots of hiking trails

You can collect stamps at free stamp table, and explore lots of interesting stamps

Take the red line from Rockville Station to Union Station stop. It is across the street once you take the escalators to the street level.