Cities of the Underworld — S4E2 — America's First Inhabitants
Synopsis
Don goes deep beneath the Great Lakes and explores flooded caves as he searches for evidence of a mysterious cave-dwelling society that may have been the first people to reach America.
About the series
Don Wildman attempt to shine new light on the most vexing mysteries of our past and delves deep as he journeys to the ends of the Earth travelling to history's most ancient places.