Fodor's Expert Review LAPIS Museum

The beautifully restored 17th-century Basilica di Pietrasanta, a Cosimo Fanzago Baroque masterpiece built on the site of the Roman Temple of Diana, hosts regular multimedia exhibitions, but the star attraction here is the underground visit to a section of Naples’s oldest aqueduct. Four tours a day descend 40 meters below the busy Via dei Tribunali to large lavishly illuminated cisterns hewed from excavated tuff two millennia ago, still filled with running water (thanks to a collaboration with the city’s waterworks).