Hagerman Fossil Beds National Monument near Hagerman, Idaho, contains the largest concentration of Hagerman Horse fossils in North America. The fossil horses for which the Monument is famous have been found in only one locale in the northern portion of the Monument called the Hagerman Horse Quarry. The 4,351-acre Monument is internationally significant because it protects the world's richest known fossil deposits from a time period called the late Pliocene epoch, 3.5 million years ago.
Thousand springs is an underground river that flows from creators of the moon national park Idaho and comes out in the Snake River valley at Hagerman. The water just comes pouring out of the ground. This was taken in the spring during the run off.