The village of Golyam Dervent is located in South-East Bulgaria, eastern of Sakar mountain, along Dervent elevations. It is part of Elhovo Municipality, Yambol District. It is at distance 30 km south of the town of Elhovo and 70 km form the South Black sea coast and the coastal town of Bourgas (with International Airport). The hamlet is situated on the frontier between Bulgaria and Turkey. Dervent elevations are a low-hilly region located eastern of Tundja river. Along their main ridge passes the frontier between Bulgaria and Turkey. Its altitude above sea level is between 100m and 556 m. About two-third of the Dervent elevations` territory is covered with oak forests.