This scenic hill-station in the Northern part of India is just mindblowing to tell the least. I have been to this place for couple of times and I must say that I have fallen in love the very first time I have been there. There are many things to be seen in Manali; but its charming beauty lies in slow moving River Beas. The color of water of Beas would simply surprise you.
I would surely suggest everyone to be in this place at least on in their lifetime. The best season would be from September(end) to January. During hign winter season, Manali may sometimes remain closed due to heavy snowfall.
There is another attraction; do not forget to go to Rohtang Pass which is about 2 yrs journey from Manali by car. There are numerous good hotels of different budgets to suit your needs. If there is a rating of 10, then I would surely rate manali 10.