A sign warning of sinkholes is seen at the entrance to an abandoned tourist resort on the shore of the Dead Sea, Israel July 27, 2015. The Dead Sea is shrinking, and as its waters vanish at a rate of more than one meter a year, hundreds of sinkholes, some the size of a basketball court, some two storeys deep, are devouring land where the shoreline once stood. Picture taken July 27, 2015. REUTERS/Amir Cohen