Start your adventure by visiting the Qutub Minar. It is a UNESCO World Heritage Site and is the tallest minaret in India. The complex also includes several other historical and architectural gems. Spend the morning exploring these ancient ruins, and be sure to visit the Iron Pillar, which has stood for over 1,600 years without rusting.
For an adrenaline-filled day, head to Rishikesh, known as the "rafting capital of India." The Ganges River offers several thrilling rapids and stunning views of the surrounding mountains. Spend the day rafting and enjoying the natural beauty. Afterward, visit one of the many ashrams or temples in the area for a peaceful evening.
End your adventure by trekking to Triund Hill in the Himalayas. The trek is moderately difficult and offers breathtaking views of the Dhauladhar range. Spend the day trekking and picnicking on the hilltop. Stay overnight in a campsite and stargaze in the clear mountain air.
If you have more time, consider visiting other historical sites in Delhi such as the Red Fort or Humayun's Tomb. For those with less time, skip the trekking and spend another day exploring Delhi's bustling markets and street food.