The Šilalė burial mounds are located on the left bank of the Šakalė stream. In the past, there was a hill surrounded by marshes and covered with oak trees, towards which a causeway led from the village of Šilalė. At the edge of the hill lies the fifth largest stone in Lithuania. Next to it, on higher ground, stands a round stone with roughly hewn sides and a flat hollow. Research has shown that it was built on a stone foundation next to a hearth, the bottom of which is surrounded by a wreath of small stones, and the slopes are paved with stones. The fire was lit many times, until the 15th–17th centuries. Birch, oak, pine bark, juniper, and melted amber and resin were found. When the sanctuary was destroyed, the altar was thrown into a pit dug nearby, but during research it was restored to its original location. Further away from the slope of the hill lies another stone with a hollow, where cult rituals were also performed. After the sanctuary was destroyed, young people from the surrounding villages gathered here to celebrate Midsummer.