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Interpretive centre and access to two caves inhabited from the last Ice Age to the medieval era. Unlike others such as Altamira, you see the original cave art here, such as the lions and giraffe that lived in this region 34,000 years ago. Tours within the caves should be booked in advance, as there are very few slots; tour prices include the Centre admission.
All those cannon pointing from forts over palm-lined promenades or bristling from gun-decks of Spanish warships: some 26,000 of them were made here from the 17th century, made possible by local iron-mining, and high-temperature furnaces to forge steel. This and similar factories closed in the 19th century when Spain lost its empire, and the foundries of Germany and Britain could make much mightier cannon.
A small museum inside a typical Pasiego house showing traditional crafts and culture.