Vainagiai Mound, also called Piliukas, is located in the Kelmė district municipality near the village of Vainagiai. The mound was built on a separate hill, surrounded by marshes on all sides. The plot is oval, elongated, stretching from east to west. Its size is 45×22 m, one meter deep in the middle and a with wider western end. On the north-western slope, 1 m below the site, there is a 10 m wide terrace, descending to the west over 1 m. The slopes are steep, 14 m high.