Cave and River Exploration in Cueva El Molino, Ramales de la Victoria

Context Cueva El Molino, located in the Matienzo karst valley in Cantabria, is a natural sinkhole of the Comellantes River, with over 1.5 kilometers of interconnected passages. The accessible route for this activity covers approximately 600 meters, combining dry and wet zones with impressive karst features such as stalactites, stalagmites, and multi-meter columns. The cool, moist air carries the scent of wet earth and moss.

The Experience Over 2.5 to 3 hours, you’ll alternate between walking through dry passages and swimming in the Comellantes River, illuminated only by your helmet’s front light. The refreshing water glides over your skin as you move through underground flows and lakes exceeding 50 meters in length. Your guide will explain each geological feature and detail, enriching the adventure with expert knowledge.

For Whom This activity requires average physical fitness and swimming ability. Suitable for children aged 5–7 years when accompanied by an adult, and for adults interested in combined caving and river trekking. Not recommended for people with claustrophobia, limited mobility, or no swimming experience.

Local Context The Matienzo Valley is known for its rich karst heritage and nearby prehistoric caves such as Covalanas and Cullalvera. The local community continues to preserve and explore these natural sites, integrating tourism with respect for both the natural and cultural environment.