Isaiah 11:15-16. “And the Lord shall utterly destroy the tongue of the Egyptian sea: and with His mighty wind shall He shake His hand over the river, and shall smite it in the seven streams, and make men go over dryshod. And there shall be an highway for the remnant of His people, which shall be left, from Assyria: like as it was to Israel in the day that he came up out of the land of Egypt.”
(Isaiah makes the comparison, in these verses, of God making a dry path through the Red Sea, like He did when Moses led the Israelites out of Egypt. Will it look like this? No idea, but I liked the picture)
God will create geographical changes to accommodate the return of the remnant of Israel to their homeland. The sea between Egypt and Arabia will be destroyed, and the river Euphrates will be smitten into seven shallow brooks. From Egypt to Assyria there will be a highway for traffic.
Cross reference: Zech. 10:11