Napoli Sotterranea (Greek-Roman Aqueduct and Cisterns)

Napoli Sotterranea is a guided underground route beneath the Centro Storico of Naples, in Campania, entered from Piazza San Gaetano 68. The galleries trace the city's history from its Greek foundation as Neapolis to the Second World War. The Greeks quarried the soft yellow tuff beneath the hill in the first centuries after the city's founding, using the stone for walls and temples and leaving large voids below street level. Under Roman rule the cavities were adapted into an aqueduct and cistern system fed from distant springs, and narrow shafts connected the cisterns to wells in the houses above. The network supplied water to the old city until a cholera epidemic in 1884-85 led to the construction of a modern water system and the closure of the old conduits. During the bombing of Naples in 1943 the same tunnels became air-raid shelters for thousands of residents. Visitors descend several flights of steps to a cool, damp environment and walk through carved passages, some so narrow that candles are handed out for the tightest sections. Preserved material includes the rock-cut cisterns, the traces of tuff extraction, and wartime remains such as beds, personal objects and graffiti left by sheltering families. The tour is guided rather than self-paced, and the narration follows a chronological sequence from quarry to aqueduct to shelter. Because the site is a working geological and archaeological environment, restoration is limited to stabilising passages, installing lighting and walkways, and safeguarding the wartime finds. Moisture and low light shape the visit, and the temperature stays well below that of the street above throughout the year. Tours depart at set times from the entrance near the Greek-Roman theatre area, and the site is a good first stop for understanding why the historic centre sits above a hollowed-out foundation.