A Colorful Hot Spring Guide to Yellowstone National Park

You can't imagine this is not Jiuzhaigou, but the starting point of the 2012 World Doomsday called by people - the Yellowstone National Park in America. It is the most beautiful one among the hundreds of hot springs in the Yellowstone Park, and it is called the Morning Glory Pool. Its color changes with the change of water temperature: pink at 82 ℃; light yellow at 74 ℃; yellow green at 68 ℃.