Chimney Rock National Historic Site - about 25 miles southeast of Scottsbluff off SR 92.
Agate Fossil Beds National Monument
301 River Road, Harrison
+1 308 668-2211
Free
Daily dawn until dusk; Visitor Center: Memorial Day-Labor Day - Daily 8AM-6PM; Off Season - Daily 8AM-4PM; Closed Christmas, New Years, and Thanksgiving
Fossils of ancient mammals, Native American history, hiking. There is no camping at the monument, so if you're visiting there, seek lodging in Scottsbluff.