The map titled "World Heritage Site - Bien Du Patrimoine Mondial, Kluane/Wrangell-St. Elias/Glacier Bay/Tatshenshini-Alsek", was prepared in cooperation with the National Park Service, Parks Canada, and BC Parks and depicts the four parks that make up a single World Heritage Site that covers 24.3 million acres. Together they comprise the largest internationally protected land-based ecosystem on the planet. The United States Educational, Scientific and Cultural Organization (UNESCO) established the World Heritage Program in 1972 for the identification and protection of the world's irreplaceable natural and cultural resources. World Heritage Sites are important as storehouses of memory and evolution, as anchors for sustainable tourism and community, and as laboratories for the study and understanding of the earth and culture. This World Heritage Site protects the prominent mountain ranges of Kluane, Wrangell, Saint Elias, and Chugach. It includes many of the tallest peaks on the continent, the world's largest non-polar icefield, extensive glaciers, vital watersheds, and expanses of dramatic wilderness.