is this place mentioned in the bible?
Yes.
Dead Sea
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.

who lived for many years in the bible Methuselah. has he been mentioned in any other sacred texts? Yes, in the Book of Jubilees and the Rabbinic literature. what is the first one about? It is an ancient Jewish religious work of 50 chapters. did any early written records of this book survive? Yes, extensive fragments among the Dead Sea Scrolls and four complete Ge'ez texts. where were the former discovered? Qumran Caves in the Judaean Desert, near Ein Feshkha on the northern shore of the Dead Sea in the West Bank. how does this sea get its name? Hebrew, meaning "sea of salt". what are the climatic conditions like here? Hot desert climate.
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Dead Sea [SEP] Biblical period
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 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 , 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]."