Hi Sweta, Nainital is a beautiful place to explore. You can go for boating in Naini Lake, visit Naina Devi Temple, enjoy the scenery at the snow view point, and shop at Mall road. You can find out more about Nainital here: https://www.tripoto.com/travel-guide/nainital You can book places to stay in Nainital here: https://goo.gl/VmA5FW Keep exploring!
Nainital is awesome place to spend holidays. Try to book the hotels in advane otherwise it will be very costly. Explore other tals also like bheemtal, kamal tal. carrying a warm clothes is must for winter. Enjoy!!!!