In 1896 the prison received its first inmates, mainly re-offenders and dangerous prisoners transferred from Buenos Aires, but also some political prisoners. A separate military prison opened in 1903 at the nearby Puerto Golondrina. The two prisons merged in 1910, and that combined complex still stands today. Thus, during the first half of the 20th century, the city centered around the prison built by the Argentine government to increase the Argentine population and to ensure Argentine sovereignty over Tierra del Fuego. The prison was intended for repeat offenders and serious criminals, following the example of the British in Tasmania and the French in Devil's Island. Escape from Tierra del Fuego was similarly difficult, although two prisoners managed to escape into the surrounding area for a few weeks. The prison population thus became forced colonists and spent much of their time building the town with timber from the forest around the prison. They also built a railway to the settlement, now a tourist attraction known as the End of the World Train ("Tren del Fin del Mundo"), the southernmost railway in the world.