Rajasthan is the largest state of the Republic of India in terms of area. It encompasses most of the area of the large, inhospitable Great Indian Desert (Thar Desert), which has an edge paralleling the Sutlej-Indus river valley along its border with Pakistan.
One of the world's oldest mountain ranges, the Aravalli Range, cradles the only hill station of Rajasthan, Mount Abu, and its world-famous Dilwara Temples, a sacred pilgrimage for Jains. Eastern Rajasthan has two national tiger reserves, Ranthambore and Sariska, as well as Keoladeo National Park near Bharatpur, once famous for its bird life.