Why is Glacier National Park recognized as a UNESCO World Heritage site? Discover more about Glacier National Park at our home page. A) The park houses the most diverse range of bird species in the world B) The park is the only location with active glaciers in the United States C) The park, along with Waterton Lakes National Park in Canada, forms the Waterton-Glacier International Peace Park, recognized for its unique climate, physiographic setting, mountain-prairie interface, and tri-ocean hydrographical divide D) The park is home to the world’s oldest living tree species Submit Answer