Several streams flow out of the western marshy slope of Glinnik (187 m above sea level); they give rise to the largest river in the Sulęcin Region - Postomia.
In the place where these little streams become one rapid stream there is a group of stones, called, according to a legend, Babski Uskok [Woman's Fault].
The legend says that many years ago a dancing party was held in Trzemeszno Lubuskie.
In the early morning hours the boys exhausted because of the strong drinks could barely stand, while the girls still wanted to dance. One of the girls made fun of the boys in particular. She wanted to dance till the morning, even if the devil were her partner. Suddenly in the next room where the elder participants of the party played skat, a mysterious visitor appeared. With a spring in his step, he approached the girl and asked her elegantly to dance a polka with him. The musicians played faster and faster as if their instruments were driven by some invisible power. All of a sudden everybody realized that the mysterious visitor was the devil himself. He grabbed the crying girl and rushed towards the stream. Some brave men armed with wooden sticks ran after them. They found neither the girl nor the kidnapper, however, just some pieces of clothes scattered all over the path leading to the stream, as well as a group of stones which have been referred to as Babski Uskok ever since.