Sightseeing: - Robers cave, Sahastradhara
Distance between Delhi to Manali approx. 310 Kms. It will take 7-8 hrs to reach Mussoorie except for the tour of Dehradun.
Eating point: -There are many restaurants on this tour. But I recommend you to go on Shiva Mama Dhaba (Restaurant) or Jain Shikanji. Because there is ample space to park your vehicle & you can enjoy any food there.