Yellowstone National Park: World Heritage Site - NPS
https://home.nps.gov/articles/000/yellowstone-national-park-world-heritage-site.htm
WebMar 29, 2021 · In 1978, just over one hundred years later, it was inscribed by UNESCO on the World Heritage list -- the United States' first World Heritage Site. It encompasses over 2 million acres (800,000 ha) in the northwestern corner of Wyoming and includes portions of Idaho and Montana.
DA: 31 PA: 59 MOZ Rank: 63