UNESCO Where the Past Comes Alive UNESCO World Heritage Sites span the globe, but only 26 exist in the United States — and Pennsylvania proudly claims three. Exploring them feels like unlocking a hidden chapter of world history, where stories of innovation, freedom, and vision unfold against the backdrop of scenic towns and storied landscapes. WORLD HERITAGE SITES Historic Bethlehem, Bethlehem 26 visitpa.com DISCOVER LEHIGH VALLEY; J. FUSCO FOR VISIT PHILADELPHIA®