The cavity was discovered in 1875 by M. Sanz de Sautuola, who carried out excavations inside it. Furthermore, between 1875 and 1879, he found the large black quadrangular signs at the back of the cave. In 1879, during Sautuola's excavations, his daughter María discovered the famous polychromes. In 1880, Sautuola published the results 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. [...]
The cave originally had up to six small entrances, two of which are preserved today: one provides access to Galleries A, B, and D, while the other leads to Gallery C. The rest were sealed off. Gallery A is linear and roughly 70 meters long, ending in a very narrow side passage. Gallery B [...]
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