Aqua Traiana
Rome, Italy
The Aqua Traiana (later rebuilt and named the Acqua Paola) was a 1st-century Roman aqueduct built by Emperor Trajan and inaugurated in 109 AD. It channelled water from sources around Lake Bracciano, 40 km (25 mi) north-west of Rome, to ancient Rome. It joined the earlier Aqua Alsietina to share a common lower route into Rome. It had only fallen into disuse in the 17th century.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).