Coming from East on the bus, pull the cord after passing the Financial Aid office right before the traffic circle, ie the last stop before the Main West stop. Walk around the traffic circle to Wannamaker Drive and walk several yards down the road. You should see a wooden staircase to your left; go down the staircase. Once you reach the bottom of the staircase, ATH is the building on your left.

From the West Campus Bus Stop, with your back to the Chapel, walk down the sidewalk along the right side of the Main West traffic circle and proceed down Chapel Drive to the main traffic circle. Turn right when you get to the circle, and take your first road right, onto Wannamaker Drive. Several yards down Wannamaker, there will be a set of wooden stairs to your left. Go down the stairs; ATH is in the building to your left when you reach the bottom of the staircase.

Or, starting out as before from the West Campus Bus Stop, head down the right side of the Main West traffic circle and take the path to your right around the back side of Few Quad. Follow the path to the McClendon Tower battlements; go across them into the Bella Union. Take the elevator to floor 00 (tricky, I know) and exit out the building. Go straight ahead, following the path between the buildings, continuing straight until you reach the very last dorm. That's Mitchell Tower, and we're on the 2nd floor. You can tell you've found the right building because Schaefer House (Edens 3A and 3B) looks different from all the other Edens buildings.