Where: Underground Naples / Napoli Sotterranea Address: 68 Piazza San Gaetano Directions (Metro): Museo or Cavour Phone: +39 081 29 69 44 cost: 9€ adults Time: Tours start Mon-Fri midday, 2pm, 4pm. Thu also 9pm. Sat-Sun 10am, midday, 2pm, 4pm, 6pm Related links: Naples - beautiful city by the bay Getting around Naples by boat or hydrofoil

Underneath the busy and chaotic streets of central Naples, you can find Naples Underground, a series of tufa-stone caves and caverns that trace back many thousands of years. Every day, there is a tour (Englsh) that lasts about an hour and a half, and talks about the history of the caves from when they were used as Roman aqueducts to the Second World War, when they were used as bomb shelters and air-raid shelters.