Grotta dei Fontanazzi is a beautiful submerged cave in Solagna, Italy. The maximum depth exceeds 130 meters, and the main branch heading into Monte Grappa is over 1 km long. But it’s not accessible to everyone. The entrance is composed of a set of restrictions and tight passages that go down to -18m. This model shows these restrictions and a way how to navigate inside them. Use the defined points to go through the passages step-by-step. Warning - might get tight! Not suitable for people with claustrophobia!
If you are interested in what awaits for those who pass the restrictions, check out this video: https://youtu.be/hyD6ruQdoRo