'Tower' in the Bible

Now the watchman was standing on the tower in Jezreel, and he spied the company of Jehu as he came, and said, "I see a company." Joram said, "Take a horseman, and send to meet them, and let him say, 'Is it peace?'"

The children of Israel did secretly things that were not right against Yahweh their God: and they built them high places in all their cities, from the tower of the watchmen to the fortified city;

He struck the Philistines to Gaza and its borders, from the tower of the watchmen to the fortified city.