Legend has it that the healing water was discovered by hunters from the castle. While they were hunting in Košnica and Dobrina, one of them began to feel sick. The hunters were dragging him through the snow towards the road to Dobrina, from where they could transport him to the Žusem Castle by wagon. In the deep snow, they noticed a patch of land with running water. They gave the water to the sick man and he soon recovered. Today, people come from near and far to the Castle Well in Dobrina, and successfully cure various wounds and stomach aches.