Montieri is a village that sits on the slopes of a hill covered by forests of chestnut trees. Its name derives from Mons aeris (Bronze Mountain), a reference to the wealth of mineral deposits in the area. The toponym Bolunnio, attributed to a village nearby, suggests that Montieri was once an Etruscan settlement before the Romans arrived, as shown by the many tunnels that have been discovered in the area and then used for mining.
Out of them all, the most beautiful and fascinating is undoubtedly Buca delle Fate, a medieval tunnel inside a gap in the rock.