Didwana, Kuchaman, Sargol, and Khatu are saline lakes located in the Thar Desert region of Rajasthan, India. These lakes are characterized by high salinity levels due to the evaporation of water in a semi-arid climate, which leads to salt accumulation over time. Their presence is significant as they support unique ecosystems and contribute to local agriculture through salt extraction, highlighting the interplay between geography, climate, and human activity in the region, a key area of focus in UPSC-related studies.