On the summit of Sorgschrofen peak, the international boundary touches (or crosses) itself at marker number 110, where one Austrian (Tyrolean: Reutte) and two German (Bavarian: Oberallgäu, Ostallgäu) municipalities meet at a quadripoint established politically in 1844, cadastrally 1342 or earlier: (in clockwise order) Jungholz (Austria), Pfronten (Germany), Schattwald (Austria), and Bad Hindelang (Germany).