Bilsk hillfort
Bilsk hillfort is a hillfort of the Scythian period (end of 8th to beginning of 3rd centuries BC) located on a hill in the interfluve of the Vorskla and the right tributary of Psel Sukha Hrun near the villages of Bilsk in Poltava Oblast and Kuzemyn in Sumy Oblast. The hillfort consists of three fortified settlements (Kuzemyn, Western Bilsk, and Eastern Bilsk settlements), united by one defensive wall (Great Bilsk hillfort).