The Frasassi Caves: discoveries in 1971, the result of the slow work of nature, are considered among the most beautiful caves by enthusiasts and tourists. Ways of tunnels and caverns make the path inside of the caves an exciting and evocative experience. Inside the cavities were formed over 190 million years, natural sculptures that inspired the imagination of numerous speleologists, and more. The caves run in the subsoil for about 18 kilometers inside the Regional Park of the Gola della Rossa and Frasassi.