Contact Information Vision Lab 322 Clark Hall Johns Hopkins University 3400 North Charles Street Baltimore, MD, 21218 Phone: 410-516-4095 Fax: 410-516-4594 Building Location and Parking See below for Clark Hall, Decker Garage parking location, and Google Maps directions to the Decker Parking Garage. Click here for a pdf map of the Homewood campus. (1mb file) Click here for more information about visiting the Homewood Campus.