There are lot of options near manali. At first complete sightseeing in manali like Hadimba devi tample, vishist tample, snow point, solang valley, club house and mall road. After spending whole day make plan for kullu for the next day. And yess visit kasol and manikaran saheb these are the best places.
There are many beautiful places to visit in and around Manali. Main Manali area: Hadimba temple
Solang Valley
Gulaba
Anjani Mahadev
Atal Tunnel
Vashisht Some adventures places:
Jana Falls
Jogini Falls
Trekking Hampta Pass Nearby Kullu area:
Kasol
Manikaran
Malana Village for some ancient view Enjoy your Manali Trip
You can go Vashishtha temple, solang valley, Rohtang pass, hidimba temple, van vihar, jogini waterfalls, hampta pass, beas river.... These are the best places in Manali