Ancient Trees in Hainich National Park
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The Betteleiche
Oak (Quercus sp.). roughly 600 to 800 years. Free. Inside Nationalpark Hainich, reached by several waymarked hiking trails including the dedicated Betteleichenweg, plus the Waagebalkenweg, Hainichlandweg and Rennstieg long-distance trails. No ticket or booking needed, but it is a walk-in forest destination rather than a roadside stop.