Under Water Stonehenge Found in Lake Michigan | Secrets of the Underground

Rocks found in Lake Michigan look like a miniature Stonehenge. Subscribe to Discovery TV for more great clips: http://www.youtube.com/subscription_c... Follow Discovery on Twitter:   / discoveryuk                 Watch Discovery UK on SkyQ and Sky+ 125, Sky Glass & Stream 138, Sky Scotland 126, Sky ROI 125, Sky Glass & Stream ROI 134, Virgin Media 177.