The menhir near the Ovcharovo village is the world's only preserved Thracian monument of this type. It represents a roughly cut trachyte conical column resembling a phallus. It is 2.10 meters high and its diameter at its widest part is approximately 1 m. The name "menhir" comes from the Brettonic languages (men - stone and hir - high). This type of equipment belongs to the so-called megalithic monuments which for the Bulgarian lands are dated back to the early Iron Age (XII - VI centuries BC.) and is associated with the Thracian times. The word “megalithic” literally stands for “made of / of large stones” when translated from Greek. This group includes various devices cut into the natural rocks or built of large stones with impressive size and weight. The group includes some Thracian fortresses, the dolmens, the rock tombs, some pools, niches, cromlechs, etc.
The menhir sites were used to serve religious purposes. The phallic shape is associated with the widely spread among the Thracian tribes cult towards the fertility and the eternal ever-reviving nature.