And the south — i.e., the Negeb.
And the plain — i.e., the plain of Jordan.
The valley of Jericho. — The city of palm trees may or may not be identical with that place.
Related Commentaries of Deuteronomy 34:3
Deuteronomy 34:3
3 And the south, and the plain of the valley of Jericho, the city of palm trees, unto Zoar.