The village of Bliznak (Twin) is located in South-East Bulgaria and is included in Municipality Malko Turnovo (Bourgas District). Bliznak is situated south of the district center city of Bourgas (54 km) and 41 km away from the town of Malko Tarnovo. The old names of the village are Karaviran, Karaevren (in Turkish means "black dragon"). Archeological finds show that a settlement has existed on this place ever since the time of Bizian Thracian kings and later during the time of the Roman emperor. To the south of the village is the area "Karaevrenovsko kale" (Gradishte). Inhabitants of the the village of Bliznak are heirs of the refugees from East Thrace, settled in it during 1913 year.