„In an abandoned train tunnel in the Paris Metro, 2014“ von freeside510 from USA – Silence. Lizenziert unter Creative Commons Attribution 2.0 über Wikimedia Commons – http://commons.wikimedia.org/wiki/File:In_an_abandoned_train_tunnel_in_the_Paris_Metro,_2014.jpg#mediaviewer/File:In_an_abandoned_train_tunnel_in_the_Paris_Metro,_2014.jpg