As the lowest point of the Earth's surface, the Dead Sea This vast water surface hosts the injection of several rivers, including the famous Jordan River. Once the water reaches the Dead Sea, it is surrounded by surrounding land and cannot flow anywhere else. The Dead Sea is not the sea, but the world's lowest lake, the water contains a high concentration of salt, is twice the average sea water, so that no living things in the water can survive, only bacteria and green algae, even the surrounding area is not grass, this is one of the reasons people call the Dead Sea.