Question: The account of the Jaredites begins with the Tower of Babel. Where was the Tower of Babel located?
Answer: Jewish historian Josephus suggests that the tower was planned by Nimrod, grandson of Ham, in about 2200 BC.
According to the Old Testament, the tower was built in the land of Shinar to “reach unto heaven” (Genesis 11:1-9). It was a giant platform with stepped, slopping sides. These structures were thought of as artificial mountains where deity could dwell and appear to mortals in sacred privacy.”
Near Hillah on the east bank of the Euphrates, on the plain in Birs Nimnrud, is an ancient ruin shaped like a pyramid that resembles a watchtower. Inscriptions suggest that the name of the ruin is “The Temple of the Seven Planets,” which some interpret to mean the “Tower of Babel.”
Source: 400 Questions and Answers About the Book of Mormon by Susan Easton Black, p. 200.