The Dead Sea sits in a valley that was formed by the movement of the Arabian
tectonic plate. It is the lowest point on earth at around 1,370 feet below
sea level. Because the sea has no outlet, evaporation leaves behind a salt
concentration of 32% or around nine times that of the ocean. Almost nothing
lives in it, although the minerals in the water reputedly have medicinal
power. The salt concentration of the water increases its density to a point
where swimmers do not sink. However, if you get the water in your eyes,
you're in for some serious pain.
Because of decreasing rainfall and diversion of source water, the water
level was slowly dropping and the lake we swam in could some day be just a dry
lake bed. At the time we visited, consideration was being given to creating a
canal to the Red Sea that would also provide hydroelectric power. But there
were questions about whether the resulting changes to the quality of the water
in the lake might defeat the purpose of attempting to save it.