Two nature monuments are protected by the state – an old oak tree near one of the hill forts and a stone called Mokas.

The site is protected on the northeast and southwest by steep slopes, marshy banks, and the river.

To protect it on the northwest, the only known Lithuanian double defensive system that uses earth and wooden outworks was erected on the projection’s neck.

Molavėnų II hill fort was built 400 m upstream in the 12th century on another projection at the confluence of the river Šešuvis and its tributary, the Jaujupis.

Only the northeast and east sides were not protected by natural defences and so were instead guarded by a series of four earthworks and four ditches.