Herrenberg - Schloss Hohenentringen (Germany)
The trail starts in Herrenberg and goes all the way to Castle Hohenentringen and is a part of the long distance hiking trail, named HW5. When you tapped the castle's wall, you doing the same route back to Herrenberg. It is a strenous trail with an altitude of round about 500 meters. Distance is 25,8 kilometers
--submitted by Marcus Muhr