Green Hill Fort
Green Hill Fort, built between 1891and 1893, sits atop Milman Hill which, at 341 feet above sea level, is the highest point on Thursday Island. The original purpose of the fort, with its three sunken artillery platforms, was to defend against a possible Russian invasion of Australia. Although the invasion never materialized, the fort did come in handy during World War II as a wireless station.
The site was also used as a weather station from 1954 to 1993.
Currently, the underground bunkers provide a home for the Torres Strait Historical Society museum.