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Mountain stream Čistá
It flows mainly south to southeast. On the upper course, the stream, in the middle part a mountain stream and at the inlet to the Elbe a smaller river, first flows through a slightly narrow valley, from the mountain village of Černý Důl the valley is more constricted. On the upper course, it flows through the Krkonoše National Park and a protected section in the protection zone of the healing resources of Janské Lázně.
Mountain stream Čistá
It flows mainly south to southeast. On the upper course, the stream, in the middle part a mountain stream and at the inlet to the Elbe a smaller river, first flows through a slightly narrow valley, from the mountain village of Černý Důl the valley is more constricted. On the upper course, it flows through the Krkonoše National Park and a protected section in the protection zone of the healing resources of Janské Lázně.