USA. Yellowstone National Park

Date of Inscription: 1978
Criteria: (vii)(viii)(ix)(x)
Property : 898349.0000 ha
Northwest corner of the State of Wyoming and relatively small adjacent areas of the States of Montana and Idaho
N44 27 38.016 W110 49 40.008
Ref: 28  

The vast natural forest of Yellowstone National Park covers nearly 9,000 km2; 96% of the park lies in Wyoming, 3% in Montana and 1% in Idaho. Yellowstone contains half of all the world's known geothermal features, with more than 10,000 examples. It also has the world's largest concentration of geysers (more than 300 geyers, or two thirds of all those on the planet). Established in 1872, Yellowstone is equally known for its wildlife, such as grizzly bears, wolves, bison and wapitis.

http://whc.unesco.org/en/list/28

Thanks to Mary Ann!