Šeimyniškiai hillfort
The hillfort dates back to the 1st millennium – 15th cent. It is one of the most beautiful and largest hillforts in Lithuania situated on the headland, which is northeast surrounded by the rivulet Pilius, and southwest - by Pilupis. The site is V-shaped, oblong, 70 m long, 40 m wide southeast, 19 m wide northwest. On every side the site was surrounded by an earthwork.