The Zwölferturm has several names: Mittagszeiger, Gederer Turm, Gederer Pfeiler or simply Zwölfer. It can only be climbed by climbers, but is rarely visited. Every year the tower tilts a bit to the north. In 1900 he could still be reached by a daring jump from the south. Today this is only possible with a rope bridge. It is assumed that he will eventually collapse. According to DAV locked all year for climbers.