What is significant about the Dead Sea?

In ancient times the Dead Sea was referred to as the Salt Sea, or sometimes the Sea of the Plain, or Lake Asphaltitis.  The name “Dead Sea” began being used by Greek writers in the second century A.D. It is around 50 miles long and nearly 10 miles wide, and it lies 16 miles directly east of Jerusalem. The water flows from Mount Hermon in the North, where the Jordan River is formed, flowing rapidly down the country until it finally pours into the Dead Sea. There is no outlet, yet because the water is so salty it evaporates nearly the same amount as the millions of tons of water that daily gushes into it from the Jordan River. The depression in the Earth where the Dead Sea is located is actually the deepest land trench in the world, at nearly 1300 feet below the Mediterranean Sea level. The color of the water is extremely blue, and the salt content is so high that nothing can live inside. There is around seven times more salt in the Dead Sea than the ocean saltwater. The climate around the Dead Sea is very tropical and warm, and many of the religious leaders of Israel lived in this beautiful and warm area. The city of Jericho is located near the northern tip of the Dead Sea, and there was a road that descended from Jerusalem to Jericho.

Genesis 14:3 – All these were joined together in the vale of Siddim, which is the salt sea.

Deuteronomy 3:17 – The plain also, and Jordan, and the coast [thereof], from Chinnereth even unto the sea of the plain, even the salt sea, under Ashdoth Pisgah eastward.