Gandhak-ki-Baoli
About 100 meters south of Adham Khan's tomb in Mehrauli village, Gandhak-ki-Baoli is one of the largest step-wells or baolis in and around Mehrauli. It was built during the reign of Emperor Iltutmish, the founder of the Slave dynasty. The baoli is known as Gandhak-ki-Baoli because of its waters smell like gandhak, which means sulphur. Also known as diving well, the baoli has a five-tiered structure with a circular well at its southern end. The well was earlier used by the local residents for sporting activity, such as diving for amusement. However, at present, the well along with the Baoli has dried up and is in state of neglect.

Visitors need to be careful while viewing the well at the southern end, as it is very deep and the ground is uneven.