Beyond bridges over an adjacent main road lies the final "Green U" park, Killesbergpark or 'Höhenpark' which is a former quarry that was converted for the Third Reich garden show of 1939 (and was used as a collection point for Jews awaiting transportation to concentration camps). The park has been used to stage many gardening shows since the 1950s, including the Bundesgartenschau and 1993 International Gardening Show, and runs miniature trains all around the park in the summer months for children and adults. The viewing tower (Killesbergturm) offers unique views across to the north east of Stuttgart.