The southernmost working railway on earth began as a prison line for firewood. From about 1909, inmates of the Ushuaia penal colony laid narrow-gauge track west from town toward the lenga forests of the Pipo valley. Wagons carried timber, stone and the convicts who cut it. Service ended when the prison closed in 1947, and the 1949 Tierra del Fuego earthquake tore up much of what remained. Rebuilt at 500-millimetre gauge and reopened to passengers in 1994, the Southern Fuegian Railway survives as the End of the World Train Tour Ushuaia. Argentines call it the Tren del Fin del Mundo. Steam locomotives, among them Camila and the Ingeniero Livio Dante Porta, haul restored carriages roughly seven kilometres from Estación del Fin del Mundo, at Ruta Nacional 3 Km 3065, to the park station inside Tierra del Fuego National Park. The route is short and deliberate. Track crosses the Pipo River on a low bridge, then follows the water upstream to the Cascada La Macarena halt. Beyond the windows lies the Cementerio de Árboles, a plain of bleached stumps cut at shoulder height by men working in deep snow, still standing a century later. Passengers holding End of the World Train Tour Ushuaia tickets also pass beaver dams, the legacy of twenty-five pairs released on the island in 1946. Tierra del Fuego National Park was created in 1960 and protects more than 60,000 hectares of lenga forest, peat bog and coastline along the Beagle Channel. Ruta Nacional 3 runs out of asphalt inside it, at Lapataia Bay, 3,079 kilometres from Buenos Aires. The railway's arrival station stands a short distance from that terminus. End of the World Train Tour Ushuaia tours therefore trace a boundary as much as a route: the last worked kilometres of track on a continent that simply stops. Little of the original prison alignment survives; what runs today is a reconstruction over the same ground, carrying visitors rather than cargo.