Sodom and Gomorrah, along with sister cities Admah and Zeboiim, were destroyed by burning sulphur raining down from the sky, around the year 2067 BC. Situated at the southern end of what is now the Dead Sea, the area was once a lush and fertile region.
“Lot lifted up his eyes and saw all the valley of the Jordan, that it was well watered everywhere—this was before the LORD destroyed Sodom and Gomorrah—like the garden of the LORD, like the land of Egypt as you go to Zoar. Genesis 13:10″
“Then the LORD rained on Sodom and Gomorrah brimstone and fire from the LORD out of heaven, and He overthrew those cities, and all the valley, and all the inhabitants of the cities, and what grew on the ground. Genesis 19:24-25″
“God turned the cities of Sodom and Gomorrah into ashes, condemned them with an overthrow, making them an example unto those that after should live ungodly. 2 Peter 2:6”
“But Lot’s wife, trailing behind him, turned back toward the cities, and she became a pillar of salt. Genesis 19:26”
“All its land is brimstone and salt, a burning waste, unsown and unproductive, and no grass grows in it, like the overthrow of Sodom and Gomorrah, Admah and Zeboiim, which the LORD overthrew in His anger and in His wrath. Deuteronomy 29:23″