Kathmandu, July 18 -- Nineteen years ago, a group of colleagues traded a Saturday morning for photography lessons from the wildlife and travel photographer, Om Prakash Yadav, who was then a graphic designer and programmer. At the time, as digital cameras were entering the market, Yadav, driven by his passion for knowledge sharing and photography, agreed to teach them.

Pashupatinath was the chosen spot. They gathered with their lenses, simply to take pictures, rejoicing in the walk which soon became one of the longest continuous photography traditions of Nepal.

It required neither a committee nor a registration fee. "Fun, food and photography," Yadav says, "in that order."

Photowalks, in this sense, have long invited people, particularl...