Remember Lot's wife! (Luke 17:32)
After the townspeople had tried to break down Lot's house so that they could get to "know" the two angels he had provided lodging to [see Sodom], the angels gave Lot a serious warning that God was going to destroy the city of Sodom in its entirety, so if he had any family living there, he should get them out quickly. At dawn the next morning, Lot still hadn't left, perhaps unable to accept the fact that God would indeed destroy the town he lived in.
When he hesitated, the men grasped his hand and the hands of his wife and of his two daughters and led them safely out of the city, for the Lord was merciful to them. As soon as they had brought them out, one of them said, "Flee for your lives! Don't look back, and don't stop anywhere in the plain! Flee to the mountains or you will be swept away!" (Genesis 19:16-17)
Lot and his family hurried away toward Zoar, a city God promised to spare on Lot's request. As they approached it, God rained down burning sulphur on Sodom.
Either sensing the destruction behind her, or more probably experiencing a strong sense of regret at having to leave behind a town that she liked, Lot's wife looked back and was instantly turned into a pillar of salt.
"There is to this day a peculiar crag at the south end of the Dead Sea, near Kumran, which the Arabs call Bint Sheik Lot, i.e., Lot's wife. It is a tall, isolated needle of rock, which really does bear a curious resemblance to an Arab woman with a child upon her shoulder." (Easton's Bible Dictionary).