Pictograph State Park is an area of significance because it contains three caves, Pictograph, Middle, and Ghost Caves, in which prehistoric hunters left rock ‘paintings’ on the walls inside them.
The oldest rock art in the cave is thought to be over 2,000 years old, and the most recent additions are probably somewhere between 200 to 500 years old.
There is a three-quarter mile trail that loops around to all three caves starting in front of the visitors center.
This historic state park is situated just outside of Billings so if you happen to be in town and looking for something cool to do, be sure to head out to see these fascinating caves.
This article was originally published by Blog – ROAD TRIP USA. Read the original article here.