Widened in the 1930's this tunnel under Civita was originally built by the Etruscans. It crosses beneath the entire town and, in its day, permitted continued access to an east-west "road" as was the Etruscan community design. Presently, it is technically closed off to foot traffic. There were signs - but, we couldn't read them ;-) We walked through the tunnel anyway ... only to get stopped from a longer hike by a steep hillside thickly covered in brambles. We returned and celebrated the adventure Etruscan-style ... with local wine.