The town is situated on the banks of the river Toundja. The territory of the area covers the middle part of the river valley. Mineral water springs are found near the village of Stefan Caradjovo, Straldja. The climate of the Tundja river valley is transcontinental, and in the southern parts of the area the climate is continental Mediterranean. The Ancient settlement of Kabile,  the remains of Yambol Mediaeval castle and the Monastery of the middle Ages in Voden are some of the sites worth seeing.