Comprising 18 platforms suspended above the ancient treetops of the Kalten Valley, the Harz's Baumwipfelpfad (treetop walkway) is sprinkled with scenic viewpoints and information stations, culminating (or originating, depending on your approach) in a bubble-like observation dome.
The most popular route is to ride the Burgberg-Seilbahn to the top of Grosser Burgberg, then follow the 2.5km Wanderweg zum Burgberg path to the far end of the 1km elevated walkway, for a total on-foot journeyof just under 4km.
A shorter route swaps the cable car for the 200m Weg zum Pfad path from the ticket office/cable-car station to the observation dome, making it a round-trip journey of around 2.4km to the end of the elevated walkway and back, with the option of returning the way you came, or beneath the canopy itself, along the Baumwurzelpfad path. There's also an option for experienced hikers which takes in the cable-car ride, but follows a steep, 700m descent from Grosser Burgberg to the far end of the Baumwipfelpfad.
At the time of writing, all ticket types can only be purchased from the on-site ticket office using cash or European EC cards: no credit cards.