
But not any cave. 3,348 meters long, 122 meters deep, 330 meters above sea level. These are the numbers of the Grottoes of Castellana, one of the most amazing complexes of karst caves in Italy. And if these numbers were not enough to awaken the spirit of adventure that is necessary to delve into this impressive underground world, the 15 million visitors who have explored it since the opening to the public could be enough to whet the curiosity to discover a place that, over the decades, has managed to win travelers from all over the world.