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The cave, located in the karst complex of Gesaltza-Arrikrutz, make up a vast natural museum carved out of the rock by the power of the water of the river Aldaola. Gallery 53 is currently the only one open to the public. Throughout its 500-metre length, visitors can take in the stunning beauty of a place that has remained intact through its natural development over the years, in a long silence only broken by the presence of fascinating creatures.
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