Treetop walkway in Hainich National Park, Thuringia, Germany

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Treetop walkway in Hainich National Park, Thuringia, Germany (© mauritius images GmbH/Alamy)

Treetop walkway in Hainich National Park, Thuringia, Germany (© mauritius images GmbH/Alamy)

Treetop walkway in Hainich National Park, Thuringia, Germany

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