Harborcreek, PA

ZIP code 16421 encompasses the town of East Hickory, Pennsylvania. This rural area is known for its scenic landscapes, including the nearby Allegheny National Forest and the beautiful Allegheny River. One of the most notable landmarks in the area is the historic Kinzua Bridge State Park, which features the remains of the Kinzua Viaduct, once the tallest and longest railroad bridge in the world.