'Tower' in the Bible

They said, “Come, let us build a city for ourselves, and a tower whose top will reach into the heavens, and let us make a [famous] name for ourselves, so that we will not be scattered [into separate groups] and be dispersed over the surface of the entire earth [as the Lord instructed].”

Now the Lord came down to see the city and the tower which the sons of men had built.

Then Israel (Jacob) journeyed on and pitched his tent on the other side of the tower of Eder [the lookout point used by shepherds].