Mongolia is one of the best places in the world for hiking. Every few hundred metres there is a stunning collection of rocks, begging to be climbed, photographed, touched, explored. The hills were coated with deep snow six inches thick in places, and the sky was a pure blue. It’s too cold for rain. We spent long days clambering over ridges, finding progressively better-looking, less-spoiled views over each one. We rode horses and bumped into nomads as fascinated with us as we were with them.