Naples Subterranean Structures

An extensive underground geothermal network and tunnel system lies beneath Naples and its surroundings, extending from Mount Vesuvius to include Pompeii and Herculaneum, and from the Campi Flegrei volcanic area beneath Naples through Pozzuoli to the coastal Baia region. Centuries of mining and infrastructure projects created vast caves and subterranean passages in this volcanic zone [1].