So this was a 1 day to and fro trip from Chandigarh to Parwanoo.
As we had our own vehicle so it was more comfortable to travel. But if you wish to visit this beauty then you can book a bus from Sector 43, Mohali which takes you towards The Himalays. Parwanoo is a small hill station connected through a ropeway which costs approx Rs. 750 per person. Timber trail helps you reach to the hill top where there are numerous restaurants. The famous one here is The Moksha (quite expensive if you are on a budget trip).
I would recommend you to just go and visit the place. Enjoy the ropeway and the view from above and come back on the same day because there is not much to look around. If you are eager to explore more then i would suggest you to go to Kasauli which is approx an hour away from Parwanoo.