Cueva del Cobre

Cueva del Cobre is a cave in La Pernía, a mountain municipality in the province of Palencia, in the Castile and León region of northern Spain. The site is best known for its huge, striking entrance and for its long-standing association with the source of the Pisuerga River, one of the region's main waterways.

How do you get there?

The cave sits in the Valle de los Redondos, on the southern slope of the Sierra del Híjar, close to the village of Santa María de Redondo. La Pernía is a small mountain municipality in the far north of Palencia province, right on the border with Cantabria, so a car is needed to reach it via local mountain roads. Cervera de Pisuerga is the nearest reference town, with signposted routes leading into the valley from there. From the parking area, visitors usually continue on foot along rocky mountain paths — the walking time depends on the exact route chosen.

What will you see?

The cave's most striking feature is its entrance: a massive, almost theatrical opening that has earned comparisons to something carved out by a giant. That sheer scale is what makes Cueva del Cobre one of the most recognizable caves in the area, even beyond its geological interest.

For centuries, the cave was believed to be the true source of the Pisuerga River, a major river of Castile and León. Inside it lies the Fuente del Cobre, or Copper Spring, the water outlet long identified as the river's starting point. Later hydrological surveys, however, showed that the Pisuerga actually originates higher up, in the glacial cirque of Covarrés, at the foot of the Valdecebollas peak. From there, the water first flows through the Sel de la Fuente area before sinking underground and resurfacing roughly three kilometres downstream — precisely at the Fuente del Cobre inside the cave. That discovery hasn't diminished the site's symbolic weight: it is still treated as inseparable from the river's story.

For visitors interested in caving, the cave and its underground network are a genuine draw — the area is often described as a small paradise for speleology enthusiasts, though exploring the deeper sections requires proper training and equipment.

When is the best time to visit?

Late spring through early autumn is the most reliable window, when mountain roads and trails are fully passable and the spring's water flow is easiest to observe. Early spring, during the snowmelt, can be an interesting time to visit because of the volume of water emerging from the cave, though trail conditions may be more demanding. In winter, snow can restrict access to the valley, so it's worth checking local conditions before setting out.

Frequently asked questions

Where exactly is Cueva del Cobre located? In the Valle de los Redondos, on the southern slope of the Sierra del Híjar, within the municipality of La Pernía in Palencia province (Castile and León).

Is Cueva del Cobre really the source of the Pisuerga River? Not quite — it was long believed to be, but surveys later showed the river actually begins higher up, in the Covarrés cirque below Valdecebollas, and only resurfaces at the cave after flowing underground for a few kilometres.

What is the Fuente del Cobre? It's the spring inside the cave that gives the site its name, the "Copper Spring" — Cueva del Cobre translates as "Copper Cave."

Can the cave be visited without a guide? The area around the entrance is accessible to regular hikers, but exploring the deeper parts of the cave system requires caving experience and proper equipment.