Grotta di Colle Pera

The main entrance is a hole at the foot of a rock from which one enters a fairly wide cavity crossed by a joint. The fissure also extends upwards through a narrow passage that opens into an upper entrance. The height difference between the two entrances is about 5 mt. A narrow opening and a small shaft lead into a small chamber and an ascending gallery that opens to the outside. The cave was initially filled with earth and stones. Trend: ascending/descending.

Hydrology and meteorology: absorbent; no circulation; environmental conditions equal to the outside.

Traversability: easy; recommended period all year round. Rigging: temporary; single rope for ascent of about 4 mt.

Geology: CDU1 Calcari Diasprigni - Middle-Upper Jurassic (Callovian-Tithonian); cherty limestones; stratified; subhorizontal; widespread, faults; stratified and corroded Diasprigni limestones. From the corrosion of these, red clay originates that filled the cave in the past.

Protection of historical-archaeological sites: no.

Notes on the name: family of shepherds from the area.