Leading line is one of the basic element of Photography. You can find in everywhere.
Liz Masoner from Photography.about.com explained that "Leading lines describes a photographic composition concept where natural and man-made lines, as well as suggested lines, are used to lead a viewer’s eyes around a photograph. You can use lines in conjunction with other compositional tools such ascentering, the rule of thirds, orpoint of view as well as letting the leading lines be the main compositional tool on its own."
