The Tigris River is one of the two major rivers in the region known as the Fertile Crescent, flowing through countries like Turkey, Syria, and Iraq. It is approximately 1,850 kilometers (1,150 miles) long and is known for its historical significance, as it supported ancient civilizations such as the Sumerians and Babylonians. The river originates in the Taurus Mountains of Turkey and eventually merges with the Euphrates River to form the Shatt al-Arab, which empties into the Persian Gulf. The Tigris is vital for irrigation and water supply in the arid regions it traverses, playing a crucial role in agriculture and local economies.