From the archaeological point of view, the cave presents evidence of attendance starting from the Neolithic period (in a chronological context between 5,600 and 5,200 BC) with the environment that became first a tomb then a place of worship on several occasions until the Bronze Age.

Between the sixth century BC and the fifth century AD Grotta Bella played the function of a real sanctuary of reference of the territory: as evidences, offerings in the form of votive bronzes of typical workmanship of the Umbrian populations and then, with the Romanization, anatomical votive terracotta.

In the cave were also found coins, lamps, small vases and an uninteresting amount of tiles that could suggest the construction, inside the cavity, of a cult building.

We do not know much about the cults practiced in the cave, but it is certain that Grotta Bella became an important religious reference of the Umbrian territory.

The sacredness of the place has been influenced also by  the intrinsic peculiarities of the site: equipped with a large initial environment in dim light, mysterious and apparently bottomless, with a trickle so intense as to appear prodigious.

Some of the materials found in the cave are preserved today inside the Plant Paleontology Center of the Dunarobba Fossil Forest.