Workers for the renaturalization of the Auehang with rubble from WWII for BUGA, 1955 Shortly before we lay the trail, Jasper sends me this picture. The caption reads "Renaturalization work at the Kassel debris heap. Construction work for the German Horticultural Show at the Auehang." It becomes clear to us that the entire slope is made of debris. Later on we find more images in the city archive and meet Mr. Düsterdieck. Volker Lange brings us rubble from Henschel's Weinberg and Mr. Boßdorf explains to us what kinds of plants are able to grow on debris.