Grand Canyon National Park is located in the state of Arizona. Over 4,500,000 people visit the park each year! The temperature at the bottom of the Grand Canyon can sometimes be 25 degrees warmer than at the top! There are over 1,000 caves in the Grand Canyon. Many people like to hike, bike, and ride mules when they visit the park. It is home to many animals like mountain lions, coyotes, bats, and elk.