Take the Footloose in Old Delhi half day walking tour around Old Delhi.
Take a walk at Connaught Place the heart of New Delhi: It is now called Rajiv Chowk. The British-designed colonial equivalent of a shopping mall, it's laid out in two concentric rings divided into blocks, all bursting with shops and lots of pampered pigeons waddling about. Long neglected, the area received a major shot in the arm after the opening of the major Metro junction of Rajiv Chowk under it, and it's going more upmarket by the day. At the centre is a small but pleasant park, while on one edge is the notorious Palika Bazaar, an underground den of cheap wares, many pirated or smuggled from overseas. The area is surrounded by tall office buildings on nearly all sides. Train fans will want to check out the Metro Museum inside the (Patel Chowk) station, open 10 AM-4 PM Tue-Sun (free with valid Metro ticket). Quite simply the best place to hang out!
National Zoological Park: Mathura Road. 9:30AM-4PM (Closed Friday). The Delhi Zoo is a very large and sprawling park dedicated to preserving the rich biodiversity of the country. This park may be the only chance of seeing a tiger or elephant for some travelers. Be prepared to do a lot of walking. Foreigner: Rs. 100, Indian: Rs. 20.