Caving in the Asón Valley: Cantabria's underground epicentre

Caving in the Asón Valley: Cantabria's underground epicentre

The Asón Valley boasts the highest cave density in Cantabria. From beginner trips in horizontal cavities to technical expeditions in Coventosa or Cuivo Mortero, this valley is the caving mecca of northern Spain.

All year round

Caving in the Asón Valley: Cantabria's underground epicentre

The Asón Valley: Cantabria's caving epicentre

The Asón Valley is, without question, the caving heart of Cantabria and one of Europe's most important karst areas. Within just 30 kilometres lie some of the continent's most extensive underground systems.

The Asón River rises from an impressive karst resurgence forming the Asón Waterfall, with a drop of over 50 metres, connecting to a vast underground network.

The great caves

Cueva Coventosa

Over 30 km of explored passages, Cantabria's longest cave. Grand galleries, underground rivers and extraordinary formations.

Cuivo Mortero de Astrana

Exceeding 40 km, Spain's longest limestone cave. Local companies offer guided experiences in accessible sections.

Cueva de Covalanas

UNESCO World Heritage. Exceptional Palaeolithic cave paintings dating back over 14,000 years.

Cueva de Pozalagua

In the nearby Carranza Valley, Europe's largest concentration of eccentric stalactites.

Caving experiences

Beginner

Companies in Ramales and Arredondo offer trips in Cueva del Escalón and Cueva El Caracol. 2-3 hours, all included, from €30.

Sport and advanced

Cuevamur offers traverses with rappelling. Coventosa and Cuivo Mortero accessible sections allow 4-6 hour experiences. The Abaro-Gentilzubi traverse combines caving with spectacular views.

Rappel caving

Vertical descents up to 30 metres in caves near Viveda and Torrelavega (Cueva del Linar).

The surroundings

Collados del Asón Natural Park for hiking. Excellent Cantabrian cuisine in Ramales. Laredo and Santoña beaches 30 minutes away. Pasiegos Valleys equally close.

How to get there

60 km from Santander, 70 km from Bilbao via the A-8 (Ramales exit). From Burgos via N-629 through Puerto de los Tornos.

Highlights

  • • Coventosa: 30+ km of galleries, Cantabria's longest cave
  • • Cuivo Mortero: 40+ km, Spain's longest limestone cave
  • • Covalanas: UNESCO World Heritage cave paintings
  • • Beginner trips from €30 at Cueva del Escalón and Cueva El Caracol
  • • 60 km from Santander, 70 km from Bilbao
  • • Combinable with beaches in Laredo and Santoña (30 min)

Practical Information

What to bring

  • Thermal clothing you don't mind getting dirty
  • Spare socks
  • Full change of clothes
  • Water and snack

Meeting point

Companies meet in Ramales de la Victoria or Arredondo. Drive to cave entrance (5-15 min). Free parking.

Tips

  • Book ahead for July-August
  • Confirm minimum age for children
  • Don't bring valuables into the cave
  • Contact company after heavy rain

Caving in the Asón Valley: Cantabria's underground epicentre

Las mejores experiencias disponibles

Points of Interest

Rincones y puntos de interés

El Castillo Cave
Cave
El Castillo Cave
Pozalagua Cave
Cave
Pozalagua Cave
El Pendo Cave
Cave
El Pendo Cave
Ojo Guareña Cave
Cave
Ojo Guareña Cave
Covalanas Cave
Cave
Covalanas Cave
La Garma Cave
Cave
La Garma Cave

Frequently Asked Questions

Resolvemos tus dudas sobre Caving in the Asón Valley: Cantabria's underground epicentre

Cueva del Escalón and Cueva El Caracol (Arredondo) for guided caving. Covalanas and Pozalagua as show caves without special equipment.
Beginner €30-50 (2-3h). Sport €50-80 (3-5h). All equipment included.
Yes, from age 6-8 for beginner trips. Show caves have no age restriction.
Year-round (constant 12-14°C). Avoid heavy rain. Book ahead for July-August.
A-8 motorway, Ramales de la Victoria exit: 45 min from Santander, 50 min from Bilbao.
Hiking in Collados del Asón, beaches at Laredo/Santoña (30 min), Pasiegos Valleys, Cantabrian cuisine in Ramales.