From Philadelphia:

Start out going east on Chestnut St toward S Broad St/PA-611. Take the 1st left onto Avenue of the Arts/PA-611.Turn right onto S Penn Sq/PA-611. Continue to follow PA-611. Turn left onto PA-611/John F Kennedy Blvd. Continue to follow John F Kennedy Blvd. Turn right onto PA-3/N 29th St. Merge onto I-76 W/Schuylkill Expy W toward Valley Forge. Take the Belmont Ave exit, EXIT 338, toward Green Lane. Turn right onto Belmont Ave. Belmont Ave becomes Green Ln. Turn left onto Ridge Ave. Turn right onto Bells Mill Rd. Turn left onto Germantown Ave.Turn right onto E Northwestern Ave. E Northwestern Ave becomes W Wissahickon Ave. Turn left onto Bethlehem Pike. 1800 BETHLEHEM PIKE is on the right.

From Plymouth Meeting:

Start out going southeast on W Germantown Pike toward E Germantown Pike.Take the 1st left onto Butler Pike. Stay straight to go onto Cold Point Hill Rd. Turn slight right onto Militia Hill Rd. Turn left onto Stenton Ave. Stay straight to go onto Militia Hill Rd. Turn right onto Skippack Pike/PA-73. Turn right onto Bethlehem Pike/PA-73. Continue to follow Bethlehem Pike.