The Thar Desert, also known as the Great Indian Desert, is a large, arid region in the northwestern part of the Indian subcontinent that forms a natural boundary between India and Pakistan.
In India, it covers 320,000 km2 (120,000 sq mi), of which 90% is in Rajasthan and extends into Gujarat, Punjab, and Haryana.
In Pakistan, it spreads over Punjab and Sindh starting from Tharparkar District in the east.
The Cholistan Desert is locally known as "Rohi 'and covers the area of Bahawalpur, Punjab.
The desert contains expanses of large sand dunes that are sometimes covered in snow during winter.