Darjeeling nd Sikkim are one of the most beautiful places in India. If you are coming with family then You should hire Taxi from Silliguri for Darjeeling nd Sikkim. Attractions in Darjeeling are Darjeeling Peace Pagoda
Happy Valley Tea Estate
Himalayan Mountaineering Institute
Darjeeling Zoo Batasia Loop Tiger Hill Places to be covered in Sikkim are
Gangtok Pelling Lachung
Yumthang Ravangla Lachen Yuksom
See MG road and local sight seeing of gangtok like Ganesh tok, himalyan zoo, flower exhibition water falls plant conservatory you can visit nathula, lachung yumthang valley in darjiling you can see zoo, tiger hill batasia loop kalimpong