In the morning, visit the Naina Devi Temple, located on the northern shore of Naini Lake, which is one of the 51 Shakti Peeths in India. In the afternoon, head to the Governor's House, a majestic building spread across 220 acres and built in Victorian Gothic architecture. End the day with a relaxing boat ride on the Naini Lake, which is surrounded by lush green hills and offers a beautiful panoramic view of the city.
Start the day by visiting the Kempty Falls, a popular tourist spot with a breathtaking view of water streaming down from the mountains. In the afternoon, hit the Mall Road, which offers stunning views of the Doon Valley and is known for its shops and street food. Finally, end the day with a visit to the Mussoorie Lake, which offers boating facilities and beautiful views of the surrounding hills.
Head to the Tehri Dam in the morning, the tallest dam in India and a popular tourist spot. In the afternoon, visit the Surkanda Devi Temple, an ancient temple located at an altitude of 3030 metres and known for its stunning views of the Himalayan range. End the day with a relaxing walk in the Kodia Jungle, which offers scenic views of the surrounding forests and hills.
Start the day with an adrenaline rush by trying out river rafting on the Ganges river. In the afternoon, visit the Laxman Jhula, a suspension bridge that is one of the most popular tourist spots in Rishikesh, and is believed to have been built during the epic period of Ramayana. Finally, end the day with a visit to the Beatles Ashram, an abandoned ashram where the Beatles learned Transcendental Meditation in 1968.
Spend the morning exploring the Rajaji National Park, a perfect destination for nature lovers, which is home to a variety of flora and fauna, including elephants, tigers, and leopards. In the afternoon, head back to Delhi for departure.
In addition to the itinerary above, you should consider visiting the Corbett National Park, which is about 3 hours away from Nainital and a popular tourist spot known for its tigers and elephants. A day trip to Auli, a skiing destination, is also recommended if you're visiting in the winter season. Make sure to try out the local cuisine, which includes dishes like Bal Mithai, Aloo ke Gutke, and Kumaoni Raita.