1. Shankweiler's Drive-In
Location: Orefield, Pa.
Founded by Wilson Shankweiler in 1934 as the second drive-in ever, it is now the oldest one still in operation. There has been one brief hiatus in service, caused by Hurricane Diane in 1955, but otherwise Shankweiler's creation has just kept on trucking. Admission is $9 for a double feature.