In the complex of  the Umbro-Markigian's Appennine, tight pu between Frasassi mountain  and M. Valmontagna it opens  the Troat of  Frasassi ( la Gola di Frasassi),  long more than 2 km.  In the Troat its found many underground galleries  that ends up to caves, with the exstraordinary beauty  of stalactite and stalagmite, little lakes and tunnels, wells and more little galleries still formatting.One of the artificial gallery, long  223 m. gives the access at a carsico complex, formatted by various caves and passways equipped for visitation;  the big and the most spectacular cave is "Grotta Grande del vento" "Big Cave of the wind".  Who ever like to visit the caves between turistic passages beautiful and affascinating, for those who has time to admire all that beauty, the tour guide organized by Concorso Frasassi, can offer you the view and the access of some of the areas that are not open to the public. What ever is your choice, it will be certainly the best and you will be satisfy.