The poem is a free retelling of the biblical plot: the Angel brought the righteous lot with his family from the doomed Sodom. Lot's wife violated the strict mandate not to turn around and was turned into a salt pillar. So this poem you can interpret as both a mythical and ethical approach.
Other approaches to interpreting this poem include biographical, psychological, historical and sociological. The languor on the native edge is determined not by its special qualities-the beauty of nature, the singularity or historical significance of the accuracy, warmth of people-everything can be accurate to the contrary, for Akhmatova is important not this: thanks to strong emotional memory every detail of the native places causes her memories of the events or sensations of the past – in other words, is emotionally saturated.