Walk the Fossil Hills Trail.
Fossil Hills Trail
This two and a half mile trail begins at the visitor center, crosses the Niobrara River wetlands (just a stream in these parts) and loops around University and Carnegie Hills, where the great bonebed of Agate was discovered in 1904. Signs point out certain historic and geologic features and identify plants along the way. An unpaved one mile side trail leads to the restored (outside only) 1910 homestead of Harold Cook, which was later used by the scientists as their "Bone Cabin" while working the fossil quarries.