One can visit to Himalaya, the north India. May be Uttarakhand or Himachal. Milam glacier, Pindari and Darma valley in Uttarakhand and Pin valley in Himachal
There are many places . Depends upon your starting point and the overall budget. To name a few :
1. Dharamshala , Shimla , Landour , Nainital , Mussoorie , Gulmarg and Patnitop in North India
2 Coorg , Ooty , Yercaud and Kodaikanal and Munnar in South
3 Tawang , shillong , Gangtok and Darjeeling in North East