The Dead Sea is a famous and interesting body of water in the holy land. 1309 feet deep. The surface of the sea is 1200 miles below sea level, the lowest surface area on the face of the earth.
Water flows in from the Jordan river, and a few small streams, but no water ever flows out.
The air temperature sometimes reaches the 120 degree range. The water has been evaporating for thousands of years, and getting constantly thicker, saltier, and deader. No fish or any other animal life survives. Even the land around the Dead Sea is dead. Often used by preachers as an illustration.