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Streaming, rent, or buy Secrets of the Underground – Season 2:
Currently you are able to watch "Secrets of the Underground - Season 2" streaming on Discovery +, Discovery+ Amazon Channel or buy it as download on Apple TV.
Where can I watch Secrets of the Underground for free?
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Synopsis
Scientist Rob Nelson investigates the strangest underground locations in the world, using the latest technology and research to shed new light on the secrets that lie just beneath our feet.
