UNESCO Series: 20 World Heritage Sites of USA

2. Yellowstone National Park


Best known for its unique geothermal features, the Yellowstone National Park lies mainly in Wyoming. It has more than 300 geysers, the largest in the world. It holds significance for being a perfect habitat for the wildlife and some of the most endangered species of plants and animals. It is the perfect site for the study, conservation and enjoyment of wildland ecosystem processes.