The Thar Desert (Rajasthani: थार मरुधर, Hindi:थार मरुस्थल, Urdu (Urdu: تھر صحرا ) is a large, arid region in the northwestern part of the Indian subcontinent and forms a natural boundary running along the border between India and Pakistan. With an area of more than 200,000 km2 (77,000 sq mi), it is the world’s 9th largest subtropical desert.
In Pakistan, the desert covers eastern Sindh province and the southeastern portion of Pakistan’s Punjab province. The Cholistan Desert adjoins the Thar desert spreading into Pakistani Punjab province.
How to reach there?
Thar desert in Pakistan spreads over an extensive area in Ghotki, Sukkar, Sanghar, Mirpur Khas and Tharparkar districts
So one can reach there by getting these cities.