In Chojnice County, in the Brusy commune, there is a very interesting cultural trail called "Leśno Kręgi Kamienne". It is located on Lake Leśno Dolne and on the Niechwaszcz River. The uniqueness of this place is evidenced, above all, by the barrow cemetery from the 1st and 2nd centuries AD. Some of the barrows have spherical enclosures, i.e. stone circles. In this area, box graves from the Iron Age have been reconstructed. Archaeological research has yielded such extraordinary finds as burial sites and ceramic clusters from the Lusatian, Pomeranian and Wielbark cultures.