Civita di Tarquinia : Catalogazione e studio delle cavità artificiali rinvenute presso il Pian di Civita e il Pian della Regina

Between 1988 and 2000 a pot-holing project undertook an underground survey of the city of Tarquinia in Italy. This report comprises a catalogue of the man-made cavities that it found along with a discussion of methodology and an analysis of its findings from the Etruscan, Roman and medieval periods.