Mounds are identified as relief formations featuring close type external earth fortifications with traces of the activities of the people who once constructed them. The main elements of the wooden castle were erected on top of the mound (hillfort) were earth ramparts. The mound was subjoined by further three constituent parts of the archaeological complex: foot settlements, foreworks and baileys. Foot settlements, which were attached to the majority of mounds, are uncovered most often.
Kalnaberžė mound is dated to the end of the 1st millenium – the beginning of the 2nd millenium. It is located near the River Kruostas, Kalnaberžė township.
Kalnaberžė, Surviliškis neighbourhood, Kėdainiai District