Although the cave contains rock art, it is not included in the tour because it is located between 600 and 1,200 meters deep, and because its karst system remains active with underground water streams. In fact, on heavy rainy days, the river gushes back from its depths, flowing beneath the 150-meter footbridge that visitors cross [...]
Between 30,000 and 10,000 years ago, groups of hunter-gatherers frequented the upper basin of the Miera River. Typically during the summer, the Paleolithic inhabitants of Cantabria would climb up to the rugged massifs of Miera to hunt Iberian ibex. The Miera River and its tributaries offered an abundance of salmon and trout. The fruit of [...]
In addition to its geological value, the cave preserves an exceptional industrial archaeology heritage derived from the zinc and lead mining that was active in the Sierra de Arnero from the mid-19th century until the late 1970s. A replica of a mining train transports visitors through the La Isidra mining gallery to an underground station. [...]
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