A 10-minute drive from the coastal city of Allinge will lead you to one of Bornholm’s most unique geological wonders: Jons Church, a towering, 22-meter-tall free-standing rock. Within this rock lies a small cave known as Jon’s Chapel, named after the monk Jon who, according to local legend, was sent to Bornholm with the mission of spreading Christianity. Each day, he would preach from inside his cave, gradually attracting curious locals. Jon became so popular that he eventually moved his sermons outside to accommodate everyone. Further south along the coast,…