Rohtang pass which is approx. 2 hr drive from manali is an awesome place to visit if you are in manali. The road is very narrow and dangerous but at the same time its very beautiful. The hills are covered with snow. This destination is very famous among tourists in summer as its an very cool place and fully covered with snow . It get massive rush and traffic jams. If you want to go to rohtang pass you have to book you taxi and bus one or two days before. Usually, the vehicles transist for rohtang pass in early morning.