The Dead Sea, also called the Salt Sea, is a salt lake bordered by Jordan to the east, and Palestine and Israel to the west. Its surface and shores are 429m (1,407 ft) below sea level, Earth’s lowest elevation on land. The Dead Sea is 304m (997 ft) deep, the deepest hypersaline lake in the world. It is 9.6 times as salty as the ocean.
Dwelling in caves near the Dead Sea is recorded in the Hebrew Bible as having taken place before the Israelites came to Canaan, and extensively at the time of King David.
Just north of the Dead Sea is Jericho. Somewhere, perhaps on the southeastern shore, would be the cities mentioned in the Book of Genesis which were said to have been destroyed in the time of Abraham: Sodom and Gomorra (Genesis 18) and the three other “Cities of the Plain”, Admah, Zeboim and Zoar (Deuteronomy 29:23). Zoar escaped destruction when Abraham’s nephew Lot escaped to Zoar from Sodom (Genesis 19:21-22). Before the destruction, the Dead Sea was a valley full of natural tar pits, which was called the vale of Siddim. King David was said to have hidden from Saul at Ein Gedi nearby.
In Ezekiel 47:8-9 there is a specific prophecy that the sea will “.. be healed and made fresh”, becoming a normal lake capable of supporting marine life. A similar prophecy is stated in Zechariah 14:8, which says that “Living waters will go out from Jerusalem, half of them to the eastern sea (likely the Dead Sea) and half to the western sea (the Mediterranean)…”