Most southerly lighthouse

The most southerly traditional lighthouse is located at a latitude of 55.96°S on the Chilean island of Isla Hornos (Hornos Island) in the Tierra del Fuego archipelago at the tip of South America. Part of a monument site in tribute to the many sailors who have perished in the treacherous waters of the Drake Passage, the 11-m (36-ft) cylindrical steel tower became operational on 17 November 1991. It underwent a reconstruction in 2006 at which point the tower was incorporated into a one-storey brick station building.

More southerly illuminated navigational aids do exist, such as one on Isla Gonzalo in the Diego Ramírez Islands as well as lights to help guide ships on the coast of Antarctica, however these are considered more beacons than true lighthouses. Even farther south is the 6-m (20-ft) light tower at Arctowski Polish Antarctic Station on King George Island, the largest of the South Shetland Islands off Antarctica, at 62.2°S.

The former holder of this record was the San Juan de Salvamento lighthouse on Isla de los Estados, Argentina, at a latitude of 54.73°S. Originally built in 1884, the tower lay abandoned from 1902, but in 1997, a group led by Andre Bronner and assisted by the Argentine Navy returned to rebuild the lighthouse on the now uninhabited island. On 26 February 1998, the light once again blazed through its windows.