Yellowstone National Park, located in the states of Wyoming, Montana and Idaho in the U.S., is renowned for its geothermal features and abundant wildlife. With a total area of 8,983 square kilometers, the park comprises of lakes, canyons, rivers and mountain ranges. Streams of tourists come to visit the magnificent Old Faithful Geyser, gorgeous Lower Falls and other popular sceneries every day. Lucky tourists can also see elk, bison, goats, foxes, bears and other wild animals. [Photo by Mi Xingang/China.org.cn]