The entrance to the cave world of Lake Thun with its impressive mountain stream that plunges into the depths, especially at high tide, has been known to the people of the region for thousands of years. As early as the Hallstatt period B. Legend has it that Suetonius, born in Scotland around A.
After spending his childhood in Ireland, Beatus went on a journey as a disciple of the prophet Peter. As an early Christian missionary, endowed with supernatural powers, he sought to convert the pagan population to the true faith.
The journey from Ireland to Lake Thun was long and arduous. After the crossing to the mainland, Beatus rode on his horse all the way to the Alps. Together with his friend Justus, Beatus made the pilgrimage along Lake Brienz to Sundlauenen, where the two strangers were given a warm welcome.
After many years of wandering, Beatus grew tired and longed for a place where he could settle down. He found what he was looking for in Sundlauenen, where he set up his hermitage. The people of the village were happy that a wise and holy man had come to their village.
They told him about an evil dragon that was destroying everything with its flames. They lived in fear and hoped for the wise man's help. Beatus wanted to free the people from this fear and set out to banish the dragon. He travelled by boat from Sundlauenen to the shore below the cave.
