Genesis 13:11

And Lot chose for himself all the country round Jordan, and Lot went from the east, and they were separated each from his brother. And Abram dwelt in the land of Chanaan.

Then Lot chose him all the plain of Jordan; and Lot journeyed east: and they separated themselves the one from the other.

So Lot chose the Plain of the Jordan for himself. Lot traveled east, and they separated themselves from one another.