'Watchtower' in the Bible

And after working the earth of it with a spade, he took away its stones, and put in it a very special vine; and he put up a watchtower in the middle of it, hollowing out in the rock a place for the grape-crushing; and he was hoping that it would give the best grapes, but it gave common grapes.

And the watchman gave a loud cry, O my lord, I am on the watchtower all day, and am placed in my watch every night:

For the fair houses will have no man living in them; the town which was full of noise will become a waste; the hill and the watchtower will be unpeopled for ever, a joy for the asses of the woods, a place of food for the flocks;