One of the world's oldest and most significant rivers is the Euphrates. At this river, a lot of history was created. Western Asia is traversed by the Euphrates River. While traveling through Syria and Iraq, the Euphrates River originates in Turkey. Before emptying into the Persian Gulf, the river merges with the Tigris. Its length is around 1,700 miles, and the average area of the basin is 190,000 square miles. The longest river in western Asia is this one.