American Underwater Stonehenge

While scanning underneath the waters of Lake Michigan for shipwrecks, archaeologists found something a lot more interesting than they bargained for, as they discovered a boulder with a prehistoric carving of a mastodon, as well as a series of stones arranged in a Stonehenge-like manner.

Rob Nelson, an ecologist by trade and an explorer by pastime, travels the country to investigate long-lost, subterranean phenomena

Rob investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge, Rob uses state-of-the-art technology in an effort to try and solve some of the mystery of this site. Watch part of this program above.