The EU's external border force, Frontex detected path that immigrants used to cross the borders of Europe, where more than 1.8 million routes in 2015. The majority of immigrants heading for Greece will take some time to travel quite a bit from Turkey to the. islands of Kos, Chios, Lesvos and Samos, often find they traveled in rubber boats and small wooden boats (flimsy rubber dinghies or small wooden boats).