The world's southernmost working railway began as a prison firewood line. In 1909 the inmates of the Ushuaia penal colony laid a 600-millimetre track west into the peat bogs to haul lenga timber back to the settlement. What now carries visitors on End of the World Train Premium Class tours was, for more than four decades, a labour line worked by men in striped uniforms under armed guard. The Ferrocarril Austral Fueguino ran until 1952, when the closure of the prison and an earthquake ended it together. Rails were lifted for scrap. Sleepers rotted into the Pipo valley. Reconstruction began in 1994 on a narrower 500-millimetre gauge, following roughly seven kilometres of the original alignment from the Estación del Fin del Mundo to the Parque Nacional terminus inside Tierra del Fuego National Park. The rebuilt line was conceived as heritage rather than transport, and it remains the only passenger railway operating in the province. Three steam locomotives work the route. Camila entered service with the reopening. Ingeniero L. D. Porta carries the name of Livio Dante Porta, the Argentine engineer whose late-steam combustion designs were adopted from Cuba to South Africa. Nora, a British-built engine, joined later. Together they make the Tren del Fin del Mundo a rare survival: a narrow-gauge heritage line whose route doubles as an archaeological record of forced labour. That record is legible from the windows. The Cementerio de Árboles is a field of lenga stumps sheared at chest height rather than at the root, because prisoners cut in deep winter snow and sawed at whatever level the drifts allowed. A century on, the wood has not rotted through. The Macarena stop sits below a thin cascade fed by snowmelt off the Martial range, with a reconstructed Yámana dwelling at the foot of the path — a nod to the people who occupied these shores for some six thousand years before the colony existed. Further on, the Pipo River braids through flats drowned by introduced Canadian beavers, an ecological accident of 1946 that reshaped the valley floor. End of the World Train Premium Class tickets denote a forward panoramic carriage with raised glazing and table service; the gauge, the route and the stops are shared with every other coach. The Ushuaia railway journey finishes where RN3, the longest highway in Argentina, runs out its final kilometres toward Lapataia Bay and the Atlantic-facing edge of the continent.