>...Kinzua Viaduct. Located in rural McKean County in northern Pennsylvania, the park preserves what remains of this once groundbreaking railroad bridge. >Originally constructed in just a few months from iron in 1882 and rebuilt using steel in 1900, the Kinzua Viaduct once held the record for the tallest railroad bridge in the world at 301 feet, surpassing New York's Brooklyn Bridge. The viaduct was considered an engineering triumph and was known as the "Eighth Wonder of the World," transporting goods like lumber, oil, and coal across the Kinzua Valley. It was hugely culturally significant, too, and attracted visitors from near and far, intrigued by its engineering ingenuity. However, in 2003, a tornado with 112 mph winds tore through the valley and damaged the structure. By 2011, a section of the railroad bridge was restored and opened as a pedestrian walkway, a testament to its enduring industrial heritage. It was so important, White men built it twice.