The largest glacial erratic in eastern Pałuki (girth: 13 m, height: 3.15 m), situated in a forest between the villages of Annowo and Szczepankowo. Popular stories in the area say the boulder was originally a few times bigger, but people kept chipping pieces off and using them to build nearby houses.

Legend has it that a small castle with an evil sorcerer stood here once upon a time. One day, some children lost their way in the neighbouring woods. The sorcerer first invited them in, then cast a spell to change them into stone figures, but the children’s brother recognised them and thus removed the spell. Then, the sorcerer and his castle changed into a huge rock which came to be known as Stone House.