From the Arc of Appalachia website: Junction is composed of nine ceremonial earthworks constructed by the Hopewell Culture roughly 2000 years ago. In their original form, the ceremonial enclosures were outlined with raised earthen walls and ringed with ditches, together covering 20 acres of land. Even though the earthworks were no longer visible to the eye when the site was purchased, with the modern technology of magnetic surveying and interpretive mowing, the earthworks are once again being revealed.
The location has four trails total. You can get a cool free app called “Junction Earthworks” to virtually explore the site as well. You have to pass the earthworks section and get on the Tippecanoe Darter trail. You’ll see a lot of hydrophilic sycamores, my alma mater’s mascot (Indiana State). FTF will get a 1933 Tecumseh trading card. Ironically enough, one of his most famous conflicts was the Battle of Tippecanoe.
Be sure to check out their other parks as well!