The plateau on which the site of Veii stands is bounded by the steeply eroded valleys of the Fosso Piordo and the Torrente Valchetta, the ancient river Cremera. A kilometre to the north-east of their confluence near the Piazza d'Armi, the site of the bath-house serving the Roman municipium Augustum Veiens was exposed by river erosion in November 1959 (fig. 1). It lies across the narrow floor of the Valchetta ravine, where the river has changed course frequently since classical times. The ancient approach probably lay along a small track leading from the edge of the main town plateau immediately above the baths. This choice of position, which certainly had pre-Roman associations, was determined by the presence of a number of hot springs which break through the valley floor at this point. They are the result of quiescent volcanic activity; another example occurred on the opposite side of Veii, in the Vignacce area of the Fosso Piordo.
The site was known to antiquarians of the last century. Canina mentions the baths briefly (p. 73) and reproduces an engraving of them (Tav. XX) in Antica cittá di Veio (1847), which presumably shows the outer shell of the building before the river broke into it (pl. XX, a). It illustrates a vital point in understanding the remains as they stand at present.