The Terek is a major river in the Northern Caucasus. It originates in the Mtskheta-Mtianeti region of Georgia and flows through North Caucasus region of Russia into the Caspian Sea. It rises near the juncture of the Greater Caucasus Mountain Range and the Khokh Range, to the southwest of Mount Kazbek, winding north in a white torrent between the town of Stepantsminda and the village of Gergeti toward the Russian region North Ossetia and the city of Vladikavkaz. It turns east to flow through Chechnya and Dagestan before dividing into two branches which empty into the Caspian Sea. Below the city of Kizlyar it forms a swampy river delta around 100 kilometres (62 mi) wide. The river is a key natural asset in the region, providing irrigation and hydroelectric power in its upper reaches.

Mount Kazbek or Mount Kazbegi is a dormant stratovolcano and one of the major mountains of the Caucasus, located in Georgia, just south of the border with Russia.