The
Mezek Fortress, in area, is claimed to be among the best preserved Bulgarian medieval castles. It dates to the 11th century. Along with the Thracian tombs, it was studied by a team under archaeologist
Bogdan Filov in 1931–1932. The castle has nine towers, five of which lie at the vulnerable south wall. The Mezek Fortress was built out of stone, with two decorative lines of bricks on the outside. It suffered some destruction around 1900, when stones from the fortress were used for the construction of
Ottoman barracks in Svilengrad. The
Mezek Thracian tomb dates to the 4th century BC. It is a large, elongated tomb that includes a covered passage of , two rectangular
antechambers of different size and a round burial chamber with a stone
sarcophagus. The number of burials of noble Thracians in the tomb was no less than four.
Gold,
silver,
bronze,
iron and
glass items and
pottery discovered in the tomb are today displayed in the
National Archaeological Museum in
Sofia. ==Nature==