Mack Truck Tour
Take the high road to the Macungie Assembly Operations Tour, in Macungie, Pennsylvania, where Mack trucks are assembled. The free tour is conducted on Tuesdays and Fridays through most of the year for visitors ages 10 and up, in groups of five or more. Reservations required (macktrucks.com or 610-351-8996).
Hershey’s Factory Works
Ogle vats of chocolate as you ride through a simulated version of the famed candy-making factory in Hershey, Pennsylvania. The free tour is sealed with a Kiss assembly line. Check the online calendar for hours on the day you wish to visit (hersheyschocolateworld.com or 717-534-4900).