Tule Springs Fossil Beds National Monument preserves thousands of Pleistocene (Ice Age) fossils that help tell the story of an ever-changing ecosystem.
150 years later, you can visit trail traces, visitor centers, museums, hiking trails, historic structures and forts related to the Pony Express National Historic Trail.
The Old Spanish National Historic Trail goes through Arizona, California, Colorado, Nevada, New Mexico, and Utah making it one of Nevada's National Parks.
Death Valley is the hottest place on earth, the lowest place in North America, and the driest place in the United States. It is also the largest National Park outside of Alaska.