La Grotta Parolini (Cogoli of Siori) is part of the resurgence of Oliero . Take the waters of the karst massif of Settecomuni . The flow of the cave Parolini can 'vary in the extreme values \u200b\u200bof up to 40 cm / sec to a minimum of 0.8, the oscillations are normally from 20 to 0.2 cm / sec.
Plunging into the lake Grotta Parolini leads to the active branch . The bottom of the pond is around 10 m. depth, size for most of pebbles and a few rock collapse.
In NW opens the first gallery, at a depth 'of the trap 15 m assumes a rectangular shape. The floor becomes flat and without any deposit. The visibility 'and' of about 6-8 m. The trap goes slightly downhill until the depth 'of 18 m. Further on the tunnel widens, the floor rises, the time drops down to a height of about 80 cm.Superata this bottleneck named " mill "the cave opens up and drops down to -60 degrees before recovering slowly.
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