The Dead Sea is salt lake on border between Israel and Jordan. Shores of the Dead Sea are lowest dry surface on Earth and his surface is 420 m under sea level. It is the also deepest hypersaline lake in the world, but it is the however second saltiest world water after Lake Asal (Djibuti). It is  8,6 saltier then the oceans and 9 times saltier then Mediterranean Sea. Salinity is at 30%. Dead Sea is 18km wide and 67 km long. His only tributary is the River Jordan. Climate around the sea is sunny with  little polution, it has less then 100 mm annual rainfall. Summer temperatures are usualy between 32 and 39 C. Over winter average temmperature is between 20 and 23. Name Dead Sea coming from lack of macroscopic organisms (fishes, water plants,…) because of high salinity. However certain quantities of bacteria and microbial fungi exist. Due the man using Jordan water for different purposes and high evaporation rate of Dead Sea, the sea is shrinking for about 1 meter at year. All shallow waters on south are drained and are now salt flats. However Dead Sea will never entirely disappear (evaporation slows as surface area decreases) beacuse Israel and Jordan are taking appropriate measures to increase inflow of water in to lake.
More information on how to get there you can
find on http://www.dead-sea.net/ and

http://wikitravel.org/en/Dead_Sea