East of the central highlands lies the Jordan Rift Valley, which is a small part of the -long Syrian-East African Rift. In Israel the Rift Valley is dominated by the Jordan River, the Sea of Galilee (an important freshwater source also known as Lake Tiberias and Lake Kinneret), and the Dead Sea. The Jordan, Israel's largest river (), originates in the Dan, Baniyas, and Hasbani rivers near Mount Hermon in the Anti-Lebanon Mountains and flows south through the drained Hula Basin into the freshwater Lake Tiberias. Lake Tiberias is in size and, depending on the season and rainfall, is at about below sea level. With a water capacity estimated at , it serves as the principal reservoir of the National Water Carrier (also known as the Kinneret-Negev Conduit). The Jordan River continues its course from the southern end of Lake Tiberias (forming the boundary between the West Bank and Jordan) to its terminus in the highly saline Dead Sea. The Dead Sea is in size and, at below sea level, is the lowest surface point on the earth. South of the Dead Sea, the Rift Valley continues in the Arabah (Hebrew Arava, Arabic Wadi 'Arabah), which has no permanent water flow, for to the Gulf of Eilat.