Structure Gallery Three Structure Gallery Three Share this:FacebookTwitterLinkedInEmailPinterestTumblrWhatsAppLike this:Like Loading... September 4, 2017September 4, 2017 by Ruth Categories: Photography, Weekly Photo ChallengeTags: airport, Alexander Calder, architecture, building, building blocks, Castle, Cathedral of Learning, childhood, design, knitting, mobile, Pittsburgh, postaday, potholder, railroad, structure, tower, train, trestle, weaving, weekly photo challenge 18 Comments