Entered from a lane close to the Trevi, the excavations of Vicus Caprarius (the name of the ancient street) include a Roman house and a Hadrian-era cistern that connected with the Aqua Virgo cistern. Eight meters deep, they lie just a few paces from the eternal hubbub of the Trevi Fountain – the spring waters that once fed these waterworks now gush forth from the fountain. The underground displays are modest, but give an idea of the engineering of ancient Rome's waterways, as well as the layers that lie beneath the city.

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