Wonderful complex constructed subterranean water and become the most interesting in the world, so as to attract thousands of visitors each year.
In the tourist trail takes about two hours, you can appreciate the beauty and majesty of nature.
You can marvel at small lakes, stalactites carved, stalagmites giganteste, up to the majestic Abyss Ancona (high 240 m.), the Hall of the thirteenth century, the Hall of Candles, the Bear and the Infinity Room, which have been enhanced by a dramatic use of lighting.
