In 1948, thanks to the activity of the Marche Speleological Group of Ancona, after a series of explorations and research by prehistorians and natural sciences, something astonishing happened.

Precisely on June 28, Mario Marchetti, Paolo Beer and Carlo Pegorari of the aforementioned Speleological Group discovered the entrance to the River Cave. From that date onwards, numerous other explorations and discoveries will be made in the area, thanks to the CAI Cave Groups of Jesi and Fabriano.

In 1966 a member of the Fabriano Speleological Group, Maurizio Borioni, found a further branch inside the Grotta del Fiume, over a kilometer long.

The explorations and research became more assiduous and enthusiastic: in July 1971 a new discovery.

This time it is some young people from Jesi who find themselves faced with a narrow opening from which a notable current of air emerges. After about a month they widened the narrow passage and on the following August 1st they passed what would be defined as the "Tarl Strait".

Approximately five kilometers of new cavities will thus open up to the wonder of young people, with a set of tunnels, wells and imposing tunnels, inside which they will find animal traces preserved over the millennia. The first trace of the most significant discovery, that of the Grotta Grande del Vento, will occur on 25 September of the same 1971, when Rolando Silvestri of the Marche Speleological Group of the Italian Alpine Club of Ancona, crossing the northern slopes of Mount Vallemontagnana, discovered a small entrance. With the help of some friends he managed to open a passage in a small room. The disappointment of the small discovery was almost immediately accompanied by the hope that something much bigger was in sight. In the small room, in fact, there were numerous openings from which air currents came out.

After a tiring excavation work, which lasted a few days, they entered a narrow passage and from here slipped towards the edge of a void. They threw a stone into the void and realized the width and depth of the cave. Their calculation, not far from the truth, was over one hundred meters.

An incredible discovery, which created great enthusiasm among the members of the group. The marvelous Great Wind Cave was thus consigned to the admiration of man. The problem then became for them to try to penetrate the cavity and reach the bottom. They quickly equipped themselves with the necessary equipment and, with a new expedition, lowered themselves into the enormous cave below which will be given the name "Ancona Abyss". The lights of the Ancona speleologists immediately highlighted the splendor and singular beauty of this new environment.

The discovery was also spread and made known through the press. The activities of the Speleological Group of Jesi and the Ancona Group then continued and intensified, the first in the Grotta del Fiume and the second in the Grotta Grande del Vento. Their objective was to find the conjunction, the communication route between the two cavities that they believed necessarily had to exist.

Their conviction and their tiring research will be carried out about two months later, on 8 December, but some speleologists from the CAI of Fabriano will follow in the footsteps of the Ancona speleologists in the Grotta Grande del Vento. They also gave a name to that passage: "Conduct of the Fabriano people". The two enormous caves thus became, from now on, an enormous labyrinth of underground environments that follow one another incessantly for over thirteen kilometres. Only speleologists, with special equipment and not without certain difficulties, are able to explore this stupendous underground world in its entirety; the others only have photos left, although beautiful.

At the end of 1972 the "Frasassi Consortium" was established, with the aim of safeguarding and enhancing the Frasassi caves and the municipal territory within which they are located. The Consortium was established between the Municipality of Genga and the Province of Ancona: an artificial tunnel of over 200 meters was built, which led to the entrance to the Grotta Grande del Vento, and then a comfortable route of around 600 meters was traced inside. He took it upon himself to take care of the lighting and it was done masterfully.

The minimum conditions had thus been created to make one of the most beautiful parts of the Grotta Grande del Vento accessible to tourists. The opening dates back to 1° September 1974; Since then many tourists continue to visit these enchanting places where they will be able to appreciate the beauty, splendor and majesty of nature.