Hells Valley Wild Monkey Park | The Coolest Stuff On The Planet

1,936 views · Published 5 October 2010 · 6:01 · Indexed 1 October 2026

Channel: HowStuffWorks · 2010 · Science & Technology

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With a penchant for hot tubs and surprising tolerance for cold weather, the monkeys of Japan are curious creatures. Join Rachel and Matt as they explore the Jigokudani area of Japan -- and explain why it's called 'Hell's Valley.'

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