Stock photography, photos: Solitary walker in silhouette Stock photos of Lone walker silhouetted against late afternoon sky walking away from tree on skyline Photograph: © Alan Oliver Click for a larger image and more information Keywords associated with this stock photo: lone, alone, walking ,walker ,stroll, abmle, lonely, loneliness, tree, silhouette, away from, space, serenity ,lifestyle, tranquil, peaceful ,negative, solitude, skyline, concept