Next to the Suvirkštis River is the archaeological complex of Ivangėnai (Karšuva), which consists of two mounds, a settlement area, and a cemetery. The main mound (Pilaitė) is situated on a separate hill on the left bank of the Suvirkštis River valley. 100 meters southeast of the mound, on a small promontory on the left bank of the Suvirkštis River, another mound is located. To the northwest, on both banks of the Suvirkštis River, there is a settlement area in a low-lying area.