At some point during your Nainital sightseeing experience make sure you take the trek to the highest point in the district, Naina Peak. Ramble through the Deodar and Cyprus tree forests, before you reach the peak. One of the best things to do in Nainital is taking in the stunning view of Himalayan peaks and Nainital city from this point. You could also consider having a relaxing picnic or challenge yourself to see how fast you can reach the top. Either way, this is sure to be a once in a lifetime experience.