Kathmandu offers some terrific places for people who like crawling vertical cliffs with the help of their fingernails. If you don't have the time to take on some Himalayan peak during this visit, the valley perimeter offers a number of stone walls guaranteed to keep you on your toes, for all those cliff hangers out there, Kathmandu offers a roster of stone walls that make for an experience of a lifetime. Now of late, rock climbing has become a popular sport in Kathmandu, which offers some terrific places for rock climbing. Nagarjun; Balaju, Shivapuri and Budhanilkantha are some of the places where you can try this.