The Israelites secretly did things against the LORD their God that were not right. From watchtower to fortified city, they built high places in all their cities.
KJV
And the children of Israel did secretly [those] things that [were] not right against the LORD their God, and they built them high places in all their cities, from the tower of the watchmen to the fenced city.
ASV
And the children of Israel did secretly things that were not right against Jehovah their God: and they built them high places in all their cities, from the tower of the watchmen to the fortified city;