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Between the Black Forest and the Vosges it's not only the Rhine that flows. There's also a hidden, underground river where animals and plants thrive.

52 min

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The Invisible River- Under Water Between the Black Forest and the Vosges

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Between the Black Forest and the Vosges it's not only the Rhine that flows. There's also a hidden, underground river where animals and plants thrive.

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English (United Kingdom) (CC)

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Closed captions refer to subtitles in available languages with the addition of relevant non-dialogue information.

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