Stock photography, photos: Lone walker silhouetted against sky Stock photos of Single figure walking along embankment beside reservoir in light of setting sun Photograph: © Alan Oliver Click for a larger image and more information Keywords associated with this stock photo: 1, one, single, lone, alone, walk, walker, stroll, amble, lonely, isolation, sky, skyline, silhouette, outline, embankment, reservoir, water, supply, lake, loch, calm, flat, reflection, concept, lonelines, melancholy, orange, sun, sunset, setting, dusk, twilight,