The City of Water is the tourist name given to the Vicus Caprarius, an ancient complex dating back to the time of Nero (55-68 A.D.), including two adjacent buildings (shops or workshops), later reunited and used as a cistern for the Virgin Aqueduct (which from 19 B.C. still brings water to the Trevi Fountain and the most beautiful fountains in the center) on which a rich domus was built, around the fourth century.
An underground spring is still active and visible at the lowest level of the excavation, where it wets the floor. The Roman buildings of Vicus Caprarius were brought to light between 1999 and 2001 during the renovation of the former Trevi Cinema.
