The Moonlight towers in Austin, Texas are the only known surviving light towers in the world. They are 165 feet (50 m) tall and have a 15-foot (4.6 m) foundation. A single tower cast light from six carbon arc lamps, illuminating a 1,500-foot-radius (460 m) circle brightly enough to read a watch.
In 1970 the towers were recognized as Texas State Landmarks, followed by the 17...