List of New Jersey Forest Fire Service fire towers

In order to aid its efforts in wildland fire suppression and fire protection, the New Jersey Forest Fire Service operates a system of 21 fire towers at locations throughout the state of New Jersey in the United States. From these fire towers, using an instrument called the Osborne Fire Finder, or an alidade, and topographical maps, trained fire observers are able to spot and triangulate the location of possible wildfires.

Source: Wikipedia — List of New Jersey Forest Fire Service fire towers (CC BY-SA 4.0)