The Thracian Plain is a fertile lowland located in southeastern Bulgaria and northern Greece. It is bordered by the Balkan Mountains to the north and the Rhodope Mountains to the south. This region is known for its rich agricultural land, making it suitable for growing various crops, including grains and vegetables. Historically, the Thracian Plain has been significant for the Thracians, an ancient group of tribes that inhabited the area. The plain's strategic location has also made it a crossroads for trade and cultural exchange throughout history, influencing the development of the surrounding regions.