The Frasassi Caves complex is one of the most grandiose and fascinating subterranean passageways in the world. It is an extensive itinerary along which a surreal landscape unfolds, like a flower, to reveal an enchanted world that recalls nature’s primordial beginnings. A complete subterranean ecosystem, where it is still possible to observe the formation of concretions, those droplets which carve and build their own architectural kingdom in which life continues to thrive, as it has done for millions of years.