It's a sinkhole where Native Americans used to run buffalo over the edge into the pit below, where they could kill and butcher them more readily. (Think pre-horse times.)
The jump is literally right off the Interstate, you can see cars going by, down in the sink hole it's pretty quiet - except for the busybody blackbirds. The three on the fence supervised us the entire time we were there. The pit is covered, although the signage says the layers of bones are 25 feet deep. That's a lot of dead buffalo.From Wikipedia: "The Vore site was used as a kill site and butchering site from about 1300 AD to about 1700 AD... Lithic evidence suggests that the Kiowa and Apache used the site as they migrated southwards to their modern home in the Texas-New Mexico region.. Later peoples using the Vore site included the Shoshone, Hidatsa, Crow and Cheyenne."Bison rib bone?
After, we headed north toward Devil's Tower.