The pandas are back! Be sure to reserve panda tickets online ahead of time. Also recommend using the Cleveland Park Metro Stop when going TO the zoo, and walking downhill to the zoo entrance; then recommend using the Woodley Park/Zoo Metro Stop when leaving the zoo because you'll keep walking downhill from the zoo to the metro stop.
Can be accessed directly from the Green Metro Line; get on at Navy Yard and take the metro in the Greenbelt direction to the Gallery Place/Chinatown stop.
This is a ~25 minute walk from the Residence Inn, or take the Green line metro (Greenbelt direction) to L'Enfant Plaza, transfer to Blue/Orange/Silver in the Largo/New Carollton/Largo direction and get off at Federal Center SW and walk ~7 minutes to the garden.
Be sure to reserve timed entry tickets ahead of time online. Take the Green line metro (Greenbelt direction) to get off at L'Enfant Plaza and follow signs for Maryland Ave/7th St/Smithsonian exit and walk ~7 minutes to the museum.