Once, narrow-gauge branch lines threaded all through Chile, feeding the main north-south trunk. One by one they closed, until only the Ramal Talca-Constitución survived. It is the country's last metre-gauge passenger railway, declared a national monument on May 25, 2007, an asset the law says cannot be destroyed. In 2018 the World Monuments Fund placed it on its watch list of endangered places after forest fires scorched the valley. The line earns its protection not for spectacle but for stubbornness: it still does the job it was built to do, more than a century on.

Building the ramal was a marathon. The North and South American Company broke ground in 1889, and the first steam train ran from Talca to Curtiduría on August 13, 1892. Construction then crawled westward for almost twenty-five years, spanning seven Chilean presidencies before the present Constitución station finally opened in December 1915. The great obstacle was the wide Maule itself. The Banco de Arena bridge that carries the line across the river was built between 1908 and 1915 by the French firm Schneider et Cie and is widely attributed to the workshop of Gustave Eiffel. Until it stood, the original Constitución station perched on a sandbank, reachable only by crossing the water.

Halfway down the line, at the 44-kilometer mark, sits González Bastías. Because a single track serves the whole route, trains traveling in opposite directions must meet and pass here, so every run pauses. During the stop, passengers buy rescoldo, a hearty country bread baked in hot embers and often eaten with pork sausage and hard-boiled egg. The town was renamed for a local poet, and its station carries a second name: Estación Poeta. In a normal year about 90,000 people ride the ramal for work, errands, and visits. When the 2010 earthquake and the tsunami that wrecked Constitución station halted service, the press reported villages turning into ghost towns until the trains came back.

The line nearly died of neglect as cars and buses lured passengers away, but in 2025 something unexpected happened. Three new Brazilian-built two-car railcars arrived, the first fresh equipment ordered in more than half a century, with stations slated for renovation and talk of double-tracking. The plan is to add capacity without losing the line's soul, preserving the legendary 1970s German railbuses that have become heritage of the Maule Region. The state operator keeps a regular service running, and locals along the route still have priority over tourists. On the Ramal Talca-Constitución, the people who need the train most still come first.