In which desert is the Derawar fort is located?

In which desert is the Derawar fort is located?

دیوار قلعہ کس صحرا میں واقع ہے؟
Explanation

The height of walls of Derawar Fort is 40 meters.

It is located in Cholistan Desert, Ahmadpur East TehsilBahawalpur.

The walls have a perimeter of 1500 metres and stand up to 30 metres high.