Big Bone Lick Trail acquired its name from its presence of fossils of prehistoric species dating back more than 10,000 years. The paleography of the prehistoric species was collected after Thomas Jefferson dispatched William Clark in 1807, four years after Meriwether Lewis visited this site during the expedition. Clark discovered heaps of bones at this site. The visitor center showcases the fossils as well as life-size models of these species. Big Bone Lick also served as a historical region for the Delaware and Shawnee indigenous tribes. These two tribes utilized the presence of salt to forage. Today, you can observe a large population of Bison in this area.