The University of Maryland is in College Park, MD. A good way to get directions is to use Google Maps; you can type in the destination A.V. Williams Building, College Park, MD 20742. Yes that really works!!!
While you visit A.V. Williams, you will want to park at the Paint Branch Visitors Parking Lot which is across the street and just north of A.V. Williams. Here is a map:
My office is 4113 A.V. Williams -- to get there, take the elevator to the fourth floor and then turn right 3 times.
Francois Guimbretiere and I share the HCIL UX lab on the 3rd floor. Make a right turn out of the elevator to 3452 A.V. Williams.