Mysterious Underground Tunnels and Bunkers for the Adventurous Traveler

20. The Naples Underground – A Subterranean City of Secrets

Few cities have as extensive an underground world as Naples, Italy, where beneath its vibrant streets lies a hidden city carved from volcanic rock. This subterranean labyrinth dates back to ancient Roman times, with tunnels, aqueducts, and catacombs stretching for over 250 miles. During World War II, these underground spaces served as bomb shelters, protecting thousands from air raids. Today, visitors can explore remnants of ancient Roman roads, forgotten churches, and even an underground garden growing in the darkness. The Naples Underground is a surreal journey through the layers of history, offering an entirely new perspective on one of Italy’s oldest cities.