According to the recorded narrations, 300 years ago, during the Lithuanian-Swedish war, the bell of Plateliai church belfry was taken down and was being carried over the ice of the frozen lake when the ice broke near the Castle island and the bell sank.
100 years later, an expedition of divers organized by the Count Shuazel searched for the sunken bell. It is said that they found the bell, but, for reasons unknown, they let it sink again. It is also said that the sound of the sunken bell can be heard from the depths of the lake.
A film crew together with a team of divers organized an expedition in the summer of 2006 to trace the sunken bell.