Glacier Bay
As the site of the largest non-polar icefield in the world it's no surprise that this location is the 3rd largest World Heritage Site and the largest in America. Spanning over 9million hectares the site includes Glacier Bay, Wrangel-St. Elias National Park in the U.S. and Kluane Tatshenshini-Alsek National Park in Canada.
Location
United States
59° 8' 37.7736" N, 138° 2' 3.9264" W
US