Naples Underground Guided Tour in English from Piazza San Gaetano, 1.5 Hours

The route runs 40 metres (131 feet) below Piazza San Gaetano, through a layer of Naples that goes back 2,400 years. An English-speaking guide leads the way, and entry fees are included.

Along the way are a Greco-Roman aqueduct, the remains of a Roman theatre, caves turned into water cisterns in the 4th century that still work today, and tunnels used as air-raid shelters.

The underground is open from 10 am to 6 pm, and guided tours leave every hour from 12 pm to 2 pm. Visitors should arrive at the square at least 30 minutes before their visit time. The tour lasts about 1.5 hours and ends back at street level.