Otter Boulder – located on the shore of Czajcze Lake, one of the most picturesque glacial lakes in the region within the Wolinski National Park. On the shore of the lake, you will see an impressive erratic boulder with a circumference of about 7 meters. Its name comes from otters, who like to bask on top of it on sunny days. Nearby on the green trail are the remains of a medieval stronghold.