From North:

From I-495 (Beltway), go south on MD 355 approximately 3.0 miles.  Turn right onto Norwood Dr.  (It is the 2nd right after crossing Bradley Blvd).  Go to end of road and continue into Norwood Park parking lot.  Look for the small green building off of the parking lot.

From South:

Go approximately 1.0 mile north from the DC-MD line and turn left onto Norwood Dr.  (If you come upon Bradley Blvd. you've gone too far.  Turn around and take 2nd right onto Norwood Dr).  Go to end of road and continue into Norwood Park parking lot.  Look for the small green building off of the parking lot.