Hi Harvinder, in north India your options are Varanasi, Rishikesh and Rajasthan. If you don't mind a bit of cold and some snow then you can visit Manali, Shimla, Kinnaur Valley, Auli, Mussoorie, Kasol or McLeodganj. Northeast India is slight difficult for solo travelling due to public transportation limitations. Meghalaya, Arunachal Pradesh and Sikkim are your best bets in Northeast India. If you make it to the Hornbill Festival (December first week) of Nagaland then you will have a once-in-a-lifetime experience for sure.