The disc barrows of Eurasia attract the attention of researchers due to the bright discoveries during the study of the famous Stonehenge. This paper is the first to publish data on the presence, location and features of disc barrows on the Lower Don. Several sites have been partially or completely excavated. The poverty or lack of finds showed that the disc barrows should be preserved for future generations of researchers. For the Semikarakorsk complex of four objects, their location is close to the latitudinal and meridional. This indicates with a high degree of probability, that they are used to determine the key dates of the annual cycle. The wide distribution of ring ditch-sanctuaries of the Early Iron Age in the steppe territory of Eastern Europe is described. Keywords: the Lower Don, disc barrows, henge, sanctuary, archeoastronomy, relief, steppe