“But his wife, from behind him, looked back, and she became a pillar of salt.” – Gen. 19:26
Lot’s wife turns back and becomes a pillar of salt. Josephus (Antiquities, Book 1 Chapter 11) wrote that this very pillar was still present in his time, around 100 AD. In Israel today there is are many salt formations around the dead sea (the area that was believed to be home to Sodom and Gomorrah).
The angels instructed Lot’s family not to look behind them (v. 17) but Lot’s wife did, hence her fate. We do not know why she turned back. Perhaps out of concern for her future sons-in-law, or other townspeople she knew who were perishing. Some would say she would not have shared the same fate unless she were guilty in her heart, being desirous of the type of living that was happening in Sodom.