Robber's Cave is a natural cave formation where a stream flows through. The morning is the perfect time to explore this place as it is not crowded and the sunlight entering the cave makes for a beautiful scene. Afternoon would be perfect to enjoy a picnic by the water and soak in the beautiful surroundings of lush green trees and hills. In the evening, you could enjoy a refreshing walk around the nearby park.
Sahastradhara is a popular attraction known for its natural beauty and therapeutic qualities. The morning could be spent exploring the caves and admiring the waterfalls. Afternoon is the perfect time to indulge in some adventure activities such as zip-lining and rappelling. In the evening, you could relax in the sulphur pools and enjoy the therapeutic benefits of the water.
If you have some extra time, you could visit the famous Tapkeshwar Temple which is just a 30-minute drive from Dehradun Railway Station. Additionally, you could take a side trip to Mussoorie which is just an hour's drive from Dehradun. Mussoorie is a famous hill station known for its scenic beauty and is a must-visit if you're in Dehradun. Don't forget to indulge in some local street food and shop for souvenirs to take back home.