In the morning, visit the Robber's Cave, a popular picnic spot and cave formation in Dehradun. Afternoon can be spent at the Forest Research Institute, a must-visit for nature and architecture enthusiasts. In the evening, head over to Rajpur Road, a bustling market filled with street food and shopping options.
Start your day in Rishikesh with a visit to the Triveni Ghat, where you can watch the Ganga Aarti ceremony. Afternoon can be spent at the Beatles Ashram, where the Fab Four stayed and meditated in the 1960s. In the evening, head over to Mussoorie, also known as the "Queen of Hills," and explore the scenic hill station by taking a cable car up to Gun Hill and strolling through the Mall Road.
In the morning, visit the Har Ki Pauri ghat to witness the Ganga Aarti ceremony. Afternoon can be spent exploring the many temples of Haridwar, including the Chandi Devi Temple and the Mansa Devi Temple. In the evening, take a dip in the holy waters of the Ganges at Har Ki Pauri ghat and experience the floating diyas ceremony.
Consider taking a day trip to the Rajaji National Park, located near Dehradun, to see the diverse flora and fauna of the region. Another side trip option is to visit the ancient city of Kedarnath, which is a major pilgrimage site for Hindus. To maximize your fun, make sure to try the local street food and shop for handicrafts and souvenirs. Lastly, don't forget to take in the breathtaking views of the Himalayas throughout your trip.