Visit the Har Ki Pauri ghat, one of the most famous landmarks and a holy place for Hindus. Witness the evening Ganga Aarti and take a holy dip in River Ganges to wash away your sins.
Explore the spiritual city of Rishikesh, visit the Laxman Jhula bridge suspended over the Ganges and take a boat ride. Explore the Trayambakeshwar temple, Geeta Bhawan, and the Beatles ashram which was famous for the visit by the British Band in the 60s.
Visit the Robber's Cave also known as Gucchupani cave with a river flowing inside the cave. A great place for adventure and exploration, you can either take a dip in the cool waters or explore the cave's length.
Take a short day trip to Malsi Deer Park to see various species of deer and Neelgai. This is also a great place for picnics and enjoying the scenic beauty of Dehradun.
Visit the famous Sahastradhara waterfall, known for its therapeutic and medicinal properties. The waterfall is surrounded by greenery, and the temperature of the water is perfect for a refreshing dip.
If you have more time, you can visit the Rajaji National Park in Dehradun, which is famous for its tigers, elephants and various bird species. If you have less time, you can skip the Malsi Deer Park and head straight to Sahastradhara.