Agarsen ki Baol is a 60 meter long and 15 meter wide historical step well on Hailey Road near Connaught Place, New Delhi. Agarsen ki Baoli is a 14th Century Structure nested between the multi-storey buildings of Connaught Place. It is designated as protected monument by Archeological Survey of India (ASI). It is believed that this Baoli was originally built by the legendary king Agrasen during the Mahabharat epic era. Baoli is a Hindi word and it means a stepwell. Agarsen ki Baoli is being made to provide constant water supply to the city and a resting place for the travellers. Agarsen ki Baoli is also a water reservoir that is known for its heritage value.
Agarsen ki baoli has unique structure which is quite different from the traditional round shape. It has three levels where each level has an arched area, which was used as a resting place. The center of the well has water and the water is also linked to a well dug in a covered platform. The gallery and chambers surrounded walls of Agarsen ki baoli are carved profusely. These chambers used to become cool and provide quiet retreats during summers.