"Starting of the circular turn"
The lower section in this portion of the cave is clearly an extension made to allow the construction of the road. In fact, perforations on the walls to place the explosive testify the "cutting" by mines of the floor that once degraded towards the river stream. The evidence of these road works are also still clear on the vault. It is likely that the ancient pedestrian crossing was once through the sided branch on the top, passage made possible with the use of a ladder.
In this part of the cave, where the ceiling is lower and the section narrow, you can spot some beautiful anemolite and cannulas. These are elongated-shaped formations, following the direction of the airflow.
The water that sources the anemolite is not the same filtered water coming from the above layers of the mountain, but instead condensation water, due to compression-expansion of the air passing through the bottleneck. For this reason, the dripping of water is constant on this point, even in summer, and the frequency can vary greatly over a few hours depending on the speed of the air and the external climatic conditions.
These formations are important markers for the study of the naturalization process that the cave is currently undertaking after the road closure. It is already clear that the deposition of new calcium carbonate will gradually cover the walls once contaminated by carbon monoxide.
