Aqueduct of Claudius

The Aqua Claudia was one of ancient Rome's most ambitious aqueducts, begun under Emperor Caligula and completed in 52 AD under Claudius, whose name it bears. Stretching roughly 69 kilometers from springs in the Sabine Hills, it carried water to Rome on a series of towering arcaded arches across the Campagna plain — a showcase of Roman hydraulic engineering. The surviving arches, now an Italian national monument, are best seen in the Parco degli Acquedotti southeast of central Rome, where rows of tuff and brick piers rise up to 30 meters, standing largely intact nearly two millennia after construction.