Kinzua Sky Walk
Located at Kinzua Bridge State Park, the Sky Walk is a reinvented railroad viaduct that was once the highest and longest in the world. Visitors can walk 600 feet out into the Kinzua Gorge to a glass-bottomed observation deck, offering a unique "birds-eye" view of the twisted steel remains left by a 2003 tornado. It is a National Engineering Landmark and one of the most iconic views in Pennsylvania.