This line of heights separates the basins of the Chorokh and the Rion (Black Sea) from those of the Aras and the Kura (Caspian Sea).
Deep gorges, through which tributaries of the Chorokh force their passage to the main river, intersect these highlands, forming most picturesque gorges.
The chief rivers are the Rion, which enters the Black Sea at Poti; the Chorokh, which enters the same sea at Batum; and the Ingur, the Kodor and the Bzyb, also flowing into the Black Sea in Abkhasia.
The deep gorges of the Chorokh and Tortum streams north of the town alone have a different appearance, being well wooded in places.
Both arms of the Euphrates have their rise in this country as well as the Aras (Araxes) and the Chorokh (Acampsis).