Hello, There are several places to visit in Uttarakhand some of the most famous tourist spots are - Haridwar, Rishikesh, Auli, Mussoorie, Lansdowne, Nanital, Kasauni, Ranikhet. You can read more about these places here: https://www.tripoto.com/trip/best-hill-stations-in-uttarakhand
I hope you have made your trip. It would be helpful for travellers if you share the travel details:
1.Route
2.Transportation
3.Weather
4.Budget
5.Places to see
6.Tips for travellers etc.
Happy travelling.