Selected as “One of the World’s Top 10 Most Beautiful Skywalks and Viewpoints in the World” by the Culture Trip, U.K. The Kinzua Sky Walk is an engineering marvel with breathtaking views of the Kinzua Gorge. Located at the Kinzua Bridge State Park in northwestern Pennsylvania, the skywalk was constructed on six of the historic Kinzua Viaduct massive steel towers remaining after the tornado of 2003. The Kinzua Viaduct was once the highest and longest railroad viaduct in the world.