Along the road which brings to Toirano village,in its wonderful valley you can visit the Toirano caves . They were created by the erosion of old underground rivers which had modelled rocks in a singular and fascinating way. The 2 most important parts are called: Colombo cave and Witch cave.
The first one is about 500m wide while the second is even bigger and you can observe in it bones of the ancien Ursus Spelaeus, footprints and typical rudimental drawings realized on the walls of the cave for religous rituals.