'Watchtower' in the Bible

And when Judah came to the watch-tower of the wilderness, they looked upon the multitude; and, behold, they were dead bodies fallen to the earth, and there were none that escaped.

And he cried as a lion: O Lord, I stand continually upon the watch-tower in the day-time, and am set in my ward whole nights;

For the palace shall be forsaken; the populous city shall be deserted; the hill and the watch-tower shall be for dens for ever, a joy of wild asses, a pasture of flocks;