An erdstall is a type of tunnel found across Europe. They are of unknown origin but are believed to date from the Middle Ages. A variety of purposes have been theorized, including that they were used as escape routes or hiding places, but the most prominent theory is that they served a religious or spiritual purpose. by wikipedia
The “Free State of Bavaria” is renowned for being culturally unique and for the emphasis which it places on preserving its heritage and traditions. It is also extraordinarily beautiful, boasting a plethora of castles, palaces, cathedrals, abbeys and monasteries not to mention spectacular scenery. Bavaria is more than Alps, men in “lederhosen” (leather pants), women in “dirndl” (traditional dresses) and frothy glasses of beer by the “maβ” (liter).