Munich, Devil's footprint
The story goes that this is the devils footprint in the entrance of a church. The church was built so quickly because the builder had made a deal with the devil that if the church had no windows (supposedly if there were no windows, God could not enter the church) then the devil would help him build the church. When the devil saw that there were windows in the church, he got so angry that he stomped his foot and left a footprint. After stomping his foot, he turned into a breeze and left the building.