A tourist sits on a chair in the Dead Sea March 17, 2009. The Dead Sea valley has had a place in human history for thousands of years. The Dead Sea may become a candidate for one of the world's seven natural wonders in a global internet election. Here at the lowest spot on earth, the famously buoyant water is ten times more saline than the ocean. But the Dead Sea is slowly but surely drying up, and could be gone completely in 50 years if no action is taken. Picture taken March 17, 2009. To match feature DEADSEA-WONDER/ REUTERS/Darren Whiteside (ISRAEL ENVIRONMENT SOCIETY HEALTH)