Sorgschrofen is a 1,635-metre-tall (5,364 ft) mountain in the Allgäu Alps of Bavaria, Germany. A lower summit of Sorgschrofen is the 1,613-metre-tall (5,292 ft) Zinken. There is a summit cross on both Sorgschrofen and Zinken. Quadripoint. The summit is the only land link Jungholz has to the rest of Austria. A rare occurrence found on the summit is that four territories (two German and two Austrian) meet in a quadripoint: On the west: Bad Hindelang, Oberallgäu, Swabia, Bavaria, Germany. On the north: Jungholz, Reutte District, Tyrol, Austria.
https://en.wikipedia.org/wiki/Sorgschrofen