Walking for pleasure is a relatively recent concept. The English habit of "going for a walk" serves a somewhat dubious purpose; Rousseau understood a walk a being a mean to "free my spirit... to clarify my thoughts... to throw me into the vastness of nature."
Georges Macaulay Trevelyan saw walking in a more fundamental light when he described himself as having "two doctors, my left and my right leg".
Part of the undeniable charm of going for a walk is that we don't have to analyse why we are doing it. We can invent all manner of reasons, be it health or physical-prowess, self-reliance or character-building, or simply nature-worship. It is a pastime that appeals to pilgrims and romantics, tourers and athletes, tramps and intellectuals ramblers and backpackers.
Above the beginning of Jonathan Abery's introduction of Corfu's Book of Walks.