The fortress at cape Kaliakra, Bulgaria

#fortress Kaliakra (Bulgarian: Калиакра; Romanian: Caliacra) is a cape in the Southern Dobruja region of the northern Bulgarian Black Sea Coast, which ends with a long and narrow headland 12 kilometres (7 mi) east of Kavarna, 60 kilometres (37 mi) northeast of Varna and 65 kilometres (40 mi) southwest of Mangalia. Kaliakra is a nature ...