AN ABANDONED spy station where spooks eavesdropped on the Soviet Union has now become a gigantic canvas for street artists. Those brave enough to scale 'Devil's Mountain' in Berlin, Germany, have added a splash of colour to the crumbling concrete structure. 7 Teufelsberg, which translates to Devil's Mountain, is the home of a former spy base Credit: Getty 7 The listening station used by US and Brit spooks is now a canvas for graffiti artists Credit: Rex 7 The iconic 'Berlin balls' were left to rot but have been given a splash of colour by street artists Credit: Alamy It...