Tigris–Euphrates river system Tigris–Euphrates river system The Tigris and Euphrates, with their tributaries, form a major river system in Western Asia. From sources originating in eastern Turkey, they flow by/through Syria through Iraq into the Persian Gulf. The system is part of the Palearctic Tigris–Euphrates ecoregion, which includes Iraq and parts of Turkey, Syria, Iran, Saudi Arabia, Kuwait, and Jordan. From their sources and upper courses in the mountains of eastern Anatolia, the rivers descend through valleys and gorges to the uplands of Syria and northern Iraq and then to the alluvial plain of central Iraq. The rivers flow in a south-easterly direction
Euphrates Tunnel chariots and connected a major temple with the royal palace on the other shore of the river, it was supposedly lined with brick and waterproofed with asphalt. A description of the tunnel as being built and used by Queen Semiramis is given by Diodorus (fl. 50 BCE) in the "Bibliotheca Historica": Philostratus (d. 250 CE) also describes the tunnel's construction in the "Life of Apollonius of Tyana": Euphrates Tunnel The Euphrates Tunnel was allegedly a tunnel which was built under the Euphrates river to connect the two halves of the city of Babylon, in the old Mesopotamia. Archaeologists believe it