'Watchtowers' in the Bible

The Israelis practiced secret things that were not right, offending the LORD their God. In addition, they built high places for use by all their towns, watchtowers, and fortified cities.

He also built watchtowers in the wilderness and had many cisterns hewed out, since he also possessed large herds, both in the Shephelah and in the midland plains. He had many farmers and vinedressers throughout the hills and fertile lands because he loved farming.

Hezekiah took courage and rebuilt all of the walls that had been broken down. Then he erected watch towers on them, and added another external wall. He fortified the terrace ramparts in the City of David and prepared a large number of weapons and shields.

a day of trumpet and battle cry against fortified cites and watch towers.