Kaukai and Obelytė mounds
On the left bank of the Peršėkė runlet, there is the Kaukai–Obelytė complex composed of two mounds standing in different villages, a pertinent of the castle (suburbium) and a subjacent village. People used to find stone hatchets around these mounds and believed in their magic effect: their healing powers and protection from death. Mounds’ complex existed from the early 1st millennium until the 11th century.