Speleologists (those who study caves) have mapped the eleven aqueducts built by Roman engineers to supply the ancient city with fresh water. While the famous arcaded overground transports are widely known and admired, less familiar are the hundreds of miles of underground tunnels and viaducts mapped and photographed as part of the study.
A technician in the stairs of “The Snail”, the Acqua Vergine aqueduct. AFP PHOTO / ANDREAS SOLARO.
Claudio aqueduct in the Aqueducts park in Rome. AFP PHOTO/Filippo MONTEFORTE.
Aqueduct tunnel. Photo: ALFONSO DIAZ BOJ FOR THE TELEGRAPH