Agate Fossil Beds National Monument
301 River Rd., Harrison, NE 69346
Agate Fossil Beds National Monument is considered one of the world’s most significant sites for Miocene Epoch mammal fossils. Beardogs, pony-sized rhinoceroses and giant land beavers with corkscrew-shaped burrows have been unearthed at this great bone bed near the Niobrara River. Visitors can hike the 2.7 mile Fossil Hills Trail to the spot where rancher James Cook first discovered fossils in the 1880s. Open daily, except major holidays.