The di a Corte grotto, a living, scintillating grotto, is the pride of Pietracorbara.The terrible bushfires of 2004 destroyed the maquis around the grotto, and the path to the grotto can't easily be found. And yet Petra Viva reopened the trail during the summer of 1998. The grotto is a living grotto: it still makes calcium candles, using the water which runs though the grotto. In terms of calcium deposits, the most remarkable part of the grotto is to be found at the beginning of the tunnel, less than ten meters from the entry. Here you will find an enormous candle of calcium still being formed , starting in the rock and climbing towards the vaulted roof to meet its partner descending from the roof. On leaving the relatively large (but low-roofed to the left) cave, a wide galley leads straight ahead for about twenty meters. At this point, a passage begins on the right, looping around the northern part of the caves. At the northern most part of the grotto, an opening leads to a narrow galley. At the end of the galley lies the cave of one hundred thousand lights. The floor is set in fixed waves and provides an amazing show of lights and reflections. The stone appears to be calcite. The next cave is even larger, but amateur speleologists are rapidly stopped by a rock which blocks the tunnel. There's nothing for it but to make a U-turn and follow the path back to the entry.

How to get there?