If you are travelling from Delhi, Kasauli in Himachal Pradesh is perfect for a night's stay. Though I was only on a day's visit here, I found the place really good for a weekend escapade. You can find out more about it at https://sassilysolo.com/kasauli/ .
Bhai some famous hill stations are listed below
1-mussorie
2- Nainital
3- mcleodganj
4- shimla
5- Dharamshala
6- auli
now the choice is yours from where you are going and which one is near from you.
Lots of palce where u can go , its depend only where you stay. some suggestion are below- 10 must visit hill stations in Northeast India. Shillong. A visitor's paradise, the capital ofMeghalaya is a must visit hill station in the Northeast.gangtok, kurseong, spelling, aizwal, darjeeling, morik, cherrapunji, tawang, kalimpong Some of the best hill stations include Syhimla, Manali, Dalhousie, Nainital, Almora, Kausani, Mussoorie, Gulmarg, Pahalgaon and Mount Abu. Top Hill Stations in West India mahabaleshwar, maharashtra
Lonavala, Maharashtra
Mount Abu, Rajasthan
Matheran, Maharashtra
Panchgani, Maharashtra
Saputara, Gujarat
lavasa, Maharashtra Top hill station in south India Munnar, Kerala
coorg, Karnataka
Ooty, Tamil Nadu
Coonor, Tamil Nadu and many more