The 7.6-metre-high observation tower on Galgenberg, north of the district of Bohlingen in Singen, is shaped like a beech leaf. This is why the observation tower is also known as the 'leaf-shaped tower'. From the top, visitors can enjoy panoramic views stretching from the island of Reichenau on Lake Constance to the striking volcanic mountains of the Hegau, including the Hohentwiel and Hohenkrähen.