The Bellegra area is affected by karst phenomena such as the depression of the Pantano (marsh) valley, where until 1911 there was a lake that was then drained for agricultural purposes.
From this small pond and its underground outlet the Arch Caves (grotta dell'Arco) originated.
They are almost a kilometer long and half a kilometer of which is fully accessible even for disabled people.
They are so called because at their entrance is a natural stone arch.
The caves are striking for the wealth of stalactites, stalagmites, sinkholes, and rooms for observing the typical fauna of these underground environments.
The large rooms have a precise charm and have names that recall their glory: the "cyclopean" salon, the "Titanic" salon, the "Dome Hall" and the "Great Hall".
The cave is crossed by a small stream that creates pools with clear water that gives even more charm to the whole system.
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