ART OF NATURE
The mildness of its climate, the richness of rivers, the fertility of the soil have always allured people to establish in this area since prehistory. Today the most part of the tiny villages as Calcata, Vitorchiano, Grotte di Castro, Bomarzo, Blera, Civita di Bagnoregio, have not moved from their original position which was often on the top of hills to warrant them from the frequent barbarian invasions, once the west roman empire decayed. What wonders most is a continuity in the long run of different centuries, between human settlements as for instance the bridge of Abbadia in Vulci and Civitacastellana risen on the ruins of Falerii Veteres and favourable natural marks which has also contributed to prevent Tuscia from being spoilt by unplanned and irrational developments.