Welcome to a world hidden in plain sight. As you stand here at Vicoletto Primo San Paolo, you are actually positioned above a massive subterranean labyrinth that stretches for miles under the bustling streets of Naples. This is Napoli Sotterranea, a place that sits forty meters below the surface, where the silence of the earth contrasts sharply with the noise of the traffic above. For over two thousand four hundred years, the people of Naples have carved their history into this soft, yellow volcanic rock known as tuff. This stone is the literal foundation of the city; in a unique cycle of construction, ancient builders quarried the rock from beneath their feet to build the palaces and churches you see on the surface today. As we begin this descent, prepare to transition from the bright Mediterranean sun into the cool, damp shadows of a timeline that spans from the ancient Greeks to the modern era.