(Last Update: 02.06.2025) In this article, I would like to introduce you to a wonderful place that I heard about when I first settled in Paris, but discovered too late because I postponed going for a long time for some reason. I kept seeing the photo above in magazines and sites promoting places to visit and see in France, so I thought, "Okay, that's nice, but would you go that far just to see a hollow rock by the sea?"