Groundbreaking Structure Found During Sonar Search (S1) | Mysteries Unearthed with Danny Trejo

Transcript

• In 2007, underwater archaeologist, Dr. Mark Holley is on a mission in Lake Michigan's Grand Traverse Bay. He's using sonar to scan the lake bed, looking for a ship that sunk years ago, but has yet to be found. [waves splashing] - [Narrator] But as Dr. Holley looks at the sonar readings, he sees something huge, something that's definitely not a sh... Read More