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Interior view of an underground cave with stalactites and stalagmites, a central underground lake, and artificial lighting. Reverse: printed text indicating 'The Caves of Bétharram (H-P.) The Underground Sanctuary', French postage stamp of 25 centimes from 1965 canceled at HÈTES-PYRÉNÉES, and a handwritten address to Mennevret. Publisher JOVE, pilgrimage production.