59. Ra.One v/s G.One

This place in Delhi used to be a large pond in the old walled city area. Some time during the decade of the 1930s, the pond was filled up so that an annual event could be shifted to that place (from which it gets its name).

Over the decades, the place has also been used for other reasons; the Municipal Corporation of Delhi isn't very happy about all this and wants to turn it into a green area where people can relax, instead of being agitated.

Which place?

Question courtesy http://infinitezounds.blogspot.com