Agate Fossil Beds National Monument, Paleontological national monument in Sioux County, Nebraska, United States.
The monument contains two prominent hills, Carnegie and University, where numerous complete Miocene mammal fossils have been discovered and preserved.
The site transformed from Agate Springs Ranch to a national monument in 1997, following its authorization in 1965 by the United States government.
The museum displays over 500 Plains Indian artifacts collected through exchanges between ranch owner Captain James Cook and Native American leaders.
Visitors can explore the fossil exhibits and natural prairie landscape through two dedicated hiking trails within the 3,057-acre protected area.
The monument features Miocene-era spiral formations called Devil's corkscrews, which are actually ancient beaver burrows created by the genus Palaeocastor.
Location: Sioux County
Inception: 1997
Website: https://nps.gov/agfo
GPS coordinates: 42.41640,-103.72800
Latest update: March 18, 2025 21:58
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