The Formation

Big Cave of Wind's morphology

If the tickets available online are sold out, it is still possible to buy them at the Ticket Office of the Caves. Admission is guaranteed.
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ATTENTION! Tickets ARE NOT REFUNDABLE, in case of non-use or arrival after the time written on the ticket. It will therefore be necessary to pay another ticket for a subsequent tour.
Access to dogs is allowed only with a pet carrier, not on a leash. For large dogs, 3 concrete dog boxes with a lockable front grille with padlock are available at the ticket office parking lot.
Located in a safe and shady place, they are not guarded. The visitor can use the pit space for a limited period of time for the visit to the cave, it cannot be booked and availability is requested once they arrive on site.

Paleorooms, so called because they represent a static position of the Caves of Frasassi through the times, represent the primordial stage of sulphureous water reaction over solid limestone. In the point where sulphureous water and river cold water met, took place the reaction ,with a mix carbonate waters that made limestone walls melt and causing chalk deposit after solution saturation. These paleorooms have always a bell shaped transversal section which should refer to a complete erosion cycle of river Sentino and to the whole hydrography. Paleorooms, if not interested by water filtering or dripping, don't present any limestone concretions but they are rich of white chalk deposits (Manhattan room).

Developed or collapsed rooms represent a further stage of the formation of the combination. After repeated erosion cycles of the river, reflected inside the Cave forming several stages represented by paleorooms, came a period of stasis of the position of Sentino's river-bed. Then the reaction zone could work always at the same altitude enlarging the paleorooms horizontally. Because of this phenomenon the limestone vault lost its support and it collapsed. Its collapsing took to the union of a great room.