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Guided Tour by Storm Lantern Take advantage of the European Heritage Days to discover the Grotte du Grand Roc in conditions similar to those of its discovery in 1924. Equipped with a storm lantern, you will be able to admire in greater detail the incredible variety and density of its crystallizations. Saturday, September 21, and Sunday, September 22 at 6:00 PM. Regular price for the special tour and half-price entry on the current regular admission fee. 🎫 Ticketing… Read more