Tower for Watchmen (Sentinels)
Source: Nav
2 Kings 9:17
Now the watchman standing on the tower in Jezreel saw Jehu’s troops approaching, and he called out, “I see a company of troops!” “Choose a rider,” Joram commanded. “Send him out to meet them and ask, ‘Have you come in peace?’”
2 Kings 18:8
He defeated the Philistines as far as Gaza and its borders, from watchtower to fortified city.