The south boundary of the Thracian lowlands is outlined by the north Rhodope foot, along which it leans close on the north Rhodopes, between the lower end of the Momina Klisura defile (at 300 m elevation) and the beginning of the Harmanli defile (at 80 m elevation).

The Maritsa River flows near the city. The climate of the area is temperate continental, which determines the variety of the vegetative types, some of which pertain