The Rajasthan Canal (also known as the Indira Gandhi Canal) is the largest irrigation canal in India and one of the longest in the world. It originates from the Harike Barrage on the Sutlej River and flows through Punjab, Haryana, and Rajasthan, transforming the arid regions of western Rajasthan into fertile agricultural land. The Suez Canal is an international shipping canal, not an irrigation canal in India.