Secrets Underground

4:00 AM to 5:00 AM

Tuesday 17 September

American Stonehenge

Season 1 Episode 1 of 8

Rob Nelson investigates subterranean secrets from around the world, beginning with mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge

Secrets Underground airs on Discovery Science at 4:00 AM, Tuesday 17 September. (Subtitles.)

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