Sip back and explore Agate Fossil Beds National Monument in Nebraska, a world-class Miocene fossil site preserving mass mortality bonebeds, ancient mammals, and High Plains geology. Located along the Niobrara River, the monument reveals drought-driven ecosystems, fossil hills, moss agates, and complete skeletons seen in the visitor centre, offering deep-time insight into climate change and Miocene life in the Great Plains of North America today.