150 years ago today on March 1st, 1872, President Ulysses Grant signed legislation that established Yellowstone as the world’s first national park. Yellowstone was set aside not because of the abundant wildlife which is a draw for many of the millions of people who visit today but because the incredible and unique geothermal features such as Grand Prismatic Hot Spring seen above. Yellowstone National Park is home to over 10,000 geothermal features, roughly half of the total number in the entire world. Happy birthday Yellowstone!