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The Pena Mea porthole is a hole about 20 m in diameter carved by karst erosion over the course of hundreds of thousands of years on a limestone cliff.
The climb to this part of the Pena Mea slope is not complicated, but the last 800 m have a gradient of 45% and are not exempt from some slips or falls.
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Historically isolated from the rest of Spain by its high mountains, Asturias claims to be a Natural Paradise. It hosts many World Heritage features and gets world wide media coverage every year when the 'Prince of Asturias Awards' winners' names are announced.
