Also known as Agar Sain Ki Baoli or Ugrasen ki Baoli, this attraction is a historical monument located on New Delhi's Halley Hill. A mosaic of various kinds of stones and rocks, Agrasen ki Baoli, is an ancient reservoir of water that rises from the depths of the earth to stand atop 103 steps of stone. Hidden between central Delhi 's business towers and residential buildings, this place is a peaceful and serene experience ideal for photography enthusiasts. The structure 's old brick walls take you back in history and you through feel a drop in temperature as you go down the stairs. Agrasen ki Baoli is a protected monument under the Archeological Survey of India Act, 1958, of Ancient Monuments and Archeological Sites and Remains.

Agrasen Ki Baoli 's construction is 15 meters wide and 60 meters long, which is very remarkable considering that it is believed to have been constructed during Mahabharata 's time. The reservoir still serves its ancient function since on some occasions the lower parts of the baoli can be seen plunging into water. On its South-Western Side, there is a mosque that stands on four pillars with a large stone on the roof. Interestingly, this place is renowned for being haunted and, very frequently, tourists have claimed to sense a strange presence here. This destination has recently become popular among local folks following the shooting here of Raju Hirani's film 'PK' starring Aamir Khan.