roman cistern

Beneath the streets of Naples lies a quietly astonishing world most people never see — a network of Roman cisterns and Greek aqueducts carved through volcanic tufa, some over 2,000 years old. You'll walk through tunnels that later served as WWII bomb shelters, layering centuries of history into a single underground journey. It's one of the largest and best-preserved subterranean complexes in Europe, and honestly unlike anything above ground.