Re-created grasslands, wetlands and wooded savannas lie along the trail leading to a "bog" diorama. Shown going into or struggling inside the marsh bog are a woolly mammoth, a mastodon, a giant sloth, bison, various skeletal remains, and scavengers feeding on the carcasses. Visitors approach the diorama on a boardwalk that rises above the floor of the marsh, enabling them to "look history in the eye." The outdoor museum continues for a mile past the entrance to the Discovery trail.  The final portion of the loop, the Bison Trace, brings a live buffalo herd into view. Year-round.