First solid evidence of the coexistence of humans and the American mastodon in eastern North America 😮😮😮 We love this area and the history is so neat to explore too. We’ve visited Rock Creek so many times and hiked on the trails, but this was the first time we went to the museum…and I can’t recommend it enough!!! Mastodon State Historic Site (where the museum and one trail to the bone bed is located) 📍1050 Charles J Becker Dr Imperial, MO 63052 Admission for the museum: Ages 13 & up: $4 Ages