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Which mountain area of the Pyrenees became a UNESCO World Heritage site in 1997?

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Aneto Peak, Pyrenees — Pyrenees Aneto Peak in the Pyrenees.

The mountain area of the Pyrenees designated as a UNESCO World Heritage site in 1997 is the region centered on Ordesa and Mount Perdido National Park (also referred to as Mont Perdu in French or Monte Perdido in Spanish). This site, which spans the border between France and Spain, is recognized for its magnificent mountain scenery, woodlands, and unique geological features.12