The Priamo Cave is an easily accessible small cave, approximately 20 meters long with a maximum depth of 8. As with many other caves in the Trieste and Isonzo Karst, in 1943 it was adapted as a military shelter, modifying the opening and internal spaces in such a way to allow soldiers to enter and exit easily. The blackened walls are evidence of how fires were lit inside and explosives were used to create new spaces, such as the niches visible on the right. The entire surrounding area was equipped with bunkers and trenches of various types, and the pre-existing natural cavities were exploited for this purpose. During the clearing work, apparently at the base of the most recent filling deposit, a toothless human jaw was found, which is why it is also known as Mandible Cave. The find was compared to other finds in karst caves and believed to belong to Mesolithic individuals.
In recent years the cavity, located a few meters from a wide path that was passable by vehicles, was used as a landfill. It was cleaned by the San Giusto Speleological Group of Trieste, which made it possible to visit it. This cavity is the first stop of Park 97, a Great War route inaugurated in the summer of 2017 in the Bosco Fornace di Prosecco.