In the vast prairies of Harrison region in Nebraska, in the valley of Niobrara River, quietly lies one of US paleontological sites ? the Agate Fossil Beds National Monument.

The monument contains several grass-covered hills, namely Carnegie Hill and University Hill, where several fossils from the Miocene epoch were found. Fossils of early mammals as old as 20 million years old had been excavated from the site. These fossils include: Miohippus, an early horse; Amphicyon, a bear dog; and Daeodon, a giant pig-like ungulate.

Real and wannabe paleontologists can partake in several unique activities at the site. They can explore the natural wonders of the park through interactive exhibits. They can also visit the museum where the fossils are displayed, join hiking trails, and attend lectures. Birdwatchers also have the opportunity to see about 140 species of birds who call the Agate area their home.