Baumkronenpfad Beelitz-Heilstätten, Canopy walkway in Beelitz, Germany

The Baumkronenpfad Beelitz-Heilstätten is a 2.2-metre-wide wooden walkway on a gently curving steel structure, running between 17 and 23 metres above the ground. It crosses the ruin of Pavilion B IV, the Alpenhaus, where the old roof structure and trees growing on the roof since 1945 are close at hand. A 40.5-metre steel observation tower with a triangular plan stands at the western entrance.

The walkway opened in 2015 as Brandenburg's first canopy path, laid out on the grounds of the former women's lung sanatorium in Beelitz-Heilstätten. Its route crosses Pavilion B IV, the so-called Alpenhaus, which burned down in 1945; the ruined walls, remnants of the roof structure and the trees that have grown on the roof for over 60 years lie directly beside the boardwalk. In 2017 the path received the Brandenburg tourism prize, and in 2020 it was extended while staying open.

The path is operated under the name "Baum & Zeit" by HPG Projektentwicklungs GmbH, and information boards along it explain the history of the individual sanatorium buildings and the plants of the forest park. From May to September a barefoot park next to the site is open. In 2017 the walkway received the Brandenburg tourism prize.

The western entrance at the 40.5-metre steel tower is step-free via lift, or reachable by stairs; the path's other access near the Alpenhaus is stairs only. A lift and stairs also serve the tower's five levels, with the walkway entered at 21.6 metres and the viewing platform at 36 metres, 200 steps up. A mid-path emergency stair lies south of the Alpenhaus.

On the roofs of the abandoned clinic buildings beneath the walkway, a forest has grown naturally over years, with trees taking root in this unusual space. This accidentally created woodland is a rare example of how nature reclaims places.