Lagoas de Alcaián

Lagoas de Alcaián is a natural peat lake in the parish of Seavia, in the municipality of Coristanco, in the province of A Coruña, Galicia. Locally known as Braña Rubia, it stands out among the region's wetlands for both its ecology and the folklore attached to it.

Where it is and what it looks like

The lake sits on flat ground in the so-called Depresión Meridiana, where impermeable basic rock keeps water from draining away. It covers roughly 0.4 km² (about 55 hectares), stretching some 1.5 km in length and up to 400 m in width, and drains through the small Regato de Brañas Rubias stream. Because of its peaty bed and surroundings, the site is best described as a peatland lake rather than a mountain or coastal lagoon in the usual sense.

Why the site is protected

Lagoa de Alcaián and the surrounding Braña Rubia area have been designated an Espazo Natural de Interese Local (a locally protected natural area) by the Coristanco town council, and the wetland is also listed in Galicia's regional wetland inventory. That protected status is meant to safeguard the peat-bog ecosystem, which supports a range of plant, animal, and fungal species characteristic of Galician wetlands.

The legend of the drowned village

The name Alcaián is tied to one of Galicia's best-known submerged-village legends. According to local tradition, a village once stood where the lake is today, but its residents refused to give alms to Saint Peter — in other versions, to Christ himself — who was travelling through in the guise of a beggar. As punishment for their lack of charity, the village was flooded and vanished beneath the water. This "drowned village as divine punishment" motif recurs across several Galician lake legends, placing Alcaián within a broader regional oral tradition.

Other things worth knowing

The area around the lagoon also has archaeological interest, with finds pointing to earlier human settlement nearby. At the same time, some sources note environmental problems at the site, including illegal peat extraction and waste dumping linked to a past lack of adequate protection — worth keeping in mind if you visit, since the wetland ecosystem is fragile and best treated with care.

Frequently Asked Questions

Where is Lagoa de Alcaián located? In the parish of Seavia, municipality of Coristanco, province of A Coruña, Galicia, in an area known as Braña Rubia.

How large is the lake? It covers about 0.4 km² (roughly 55 hectares), is around 1.5 km long, and up to 400 m wide.

Is the site protected? Yes. It has been designated an Espazo Natural de Interese Local by the Coristanco municipality and is included in Galicia's regional wetland inventory.

What legend is associated with the lake? Local tradition holds that a village was flooded as punishment for refusing alms to Saint Peter, or to Christ, who appeared disguised as a beggar — a motif shared with several other Galician lake legends.