7Yellowstone National Park, Wyoming, Montana, and Idaho
As the world’s first national park, Yellowstone National Park is famous for its geothermal features, wildlife, and diverse landscapes. The park is home to over half of the world’s geysers, including the iconic Old Faithful, which erupts with regularity, thrilling onlookers. The vibrant colors of the Grand Prismatic Spring, the largest hot spring in the U.S., are equally impressive, with its rainbow of blue, green, and orange hues. In addition to its geothermal wonders, Yellowstone boasts lush forests, waterfalls, and abundant wildlife, including bison, elk, and bears.