Manali is best places in for honeymoon that rightly make it a lover’s nest. Manali is much more than Manikaran, Vashisht Hot Spring, and Hadimba Temple.
Snow covered hills and tall deodars guard this wonderful temple basking in the serenity of nature.
If like to travel south india, i will recommend kerela, where you can enjoy beaches,backwaters and tea garden hills,,, and if you are adventurous then Manglore, where you can go for scuba diving and horse riding along the beach.
checkout this article on scuba diving http://travellingkida.com/kapu-scuba/ besides these Goa is all time fav destination for honeymoon
Tawang is an off beat destination and beats Manali hands down.
Coonoor and Munnar are good options for hill stations
South Manali is quite pleasant too
Darjeeling is a darling of the masses
Kalimpong is a better option than Darjeeling
In North 1) Kullu Manali 2) Shimla
3) Nainital
4) Dalhousie
5) Gulmarg #kashmir
6) Mount Abu & Udaipur. in South 1) Goa
2) Coorg 3) Ooty my favourite
4) Munnar
5) Kodaikanal