A woman rides her bike past a graffiti depicting Europe as the Grim Reaper, with a small door opening through its wall-like body and a barbed wire fence, in Thessaloniki on 4 October, 2015. More than half a million people have reached Europe via the Mediterranean this year -- including over 310,000 landing in Greece, figures from the UN refugee agency show. AFP PHOTO / SAKIS MITROLIDIS / AFP PHOTO / SAKIS MITROLIDIS (Photo credit should read SAKIS MITROLIDIS/AFP/Getty Images)
