Rajasthan occupies the northwestern part of India, bordered by Pakistan to the west and northwest. The state shares borders with Punjab, Haryana, Uttar Pradesh, Madhya Pradesh, and Gujarat. The Aravalli Range, one of the oldest mountain ranges in the world (dating back to the Precambrian era, approximately 1.6 billion years old), runs diagonally across the state from Delhi in the northeast to Palanpur in Gujarat in the southwest, dividing Rajasthan into two distinct physiographic regions.
The northwestern portion consists of the great Thar Desert (also known as the Great Indian Desert), covering approximately 61% of the state's area. This is one of the most densely populated deserts in the world. The southeastern region is comparatively greener, more fertile, and receives higher rainfall. The Aravalli hills rise to a maximum height of 1,722 metres at Guru Shikhar on Mount Abu, the only hill station in Rajasthan.