Ayuntamiento de San Martín del Rey Aurelio

Ayuntamiento de San Martín del Rey Aurelio is the town hall of the municipality of the same name, set in the Nalón river valley in central Asturias. The building stands on Plaza Nicanor Piñole in Sotrondio, the municipality's main town, and works as a natural starting point for exploring this stretch of Asturias's coal-mining country.

Where exactly is this?

San Martín del Rey Aurelio is a small municipality — roughly 52 square kilometres and around 18,600 residents — sitting along the Nalón valley in the southern part of central Asturias. For decades the local economy ran almost entirely on coal: dense clusters of mine shafts and related infrastructure made the area one of Spain's key mining basins. Industrial restructuring in the 1980s cut production down to a single active mine, and the municipality has since leaned into services and heritage tourism instead.

What is there to see near the town hall?

The town hall itself isn't a sightseeing stop, but it makes a sensible base for a visit. A short distance away in El Entrego is the Museum of Mining and Industry (MUMI), a pioneering facility in Spain dedicated to the region's coal-mining past, built right next to the historic San Vicente shaft. That shaft holds a particular place in labour history: in the 1920s it became the first mine in Spain to be self-managed directly by a miners' union.

A few hundred metres further on is Pozo Sotón, the only coal mine in Europe that opens its underground galleries to visitors. The site also runs a Centre of Experiences and Mining Memory, displaying the equipment and machinery miners once worked with.

What older heritage survives in the municipality?

Beyond its industrial past, the area keeps a handful of older landmarks: the church of San Martín, the chapel of San Roque, and the 18th-century García Ciaño family palace in Blimea. Traditional Asturian hórreos and paneras — raised wooden granaries on stone pillars — are also scattered across the villages that make up the municipality, a common sight throughout this part of Asturias.

Anything else worth knowing before visiting?

The Nalón valley and the hills around it fall within the Protected Landscape of the Mining Basins (Cuencas Mineras), which makes for decent riverside walking routes and a chance to try Asturian cooking at the small restaurants scattered through the valley. Because San Martín del Rey Aurelio borders several other mining towns along the Nalón, it's easy to fold a visit here into a single-day route covering more than one site tied to Asturias's coal-mining heritage.

Frequently Asked Questions

Where is the Ayuntamiento de San Martín del Rey Aurelio located? On Plaza Nicanor Piñole in Sotrondio, the main town of the San Martín del Rey Aurelio municipality, in the Nalón river valley in central Asturias.

What is this municipality best known for? Its coal-mining history — home to the Museum of Mining and Industry (MUMI) in El Entrego and to Pozo Sotón, the only mine in Europe offering underground tours.

Is it worth spending a full day in the area? Yes — the region pairs industrial heritage sites with walking routes through the Protected Landscape of the Mining Basins and local Asturian food, so combining it with neighbouring Nalón valley towns makes for a reasonable day trip.

Does the municipality have any pre-industrial heritage left? Yes, including the church of San Martín, the San Roque chapel, the 18th-century García Ciaño palace in Blimea, and traditional Asturian hórreos and paneras.