Hey Sudarshan, You can visit these places in two hours from NDLS railway station ... Red fort is hardly 15 mins distance ... Paharganj is very near ... Chandni chowk is also 20 mins ... Karolbagh can also be visited Bro ... Connaught place is also worth a visit ... The best thing you can do is book an ola and go around Bro ... or you can also speak with any auto guy and go around ... see that you take an auto after 500 metres from railway station as autos near NDLS will cost you bomb for 2 hours ... You can select two of the above Places and plan it accordingly ... Also Kee in mind about the traffic in Delhi ... Happy Travelling Bro!!!