Narni Sotterranea is an underground complex located in the town of Narni, Italy. It consists of a series of tunnels, chambers, and ancient structures that date back to Roman times. The site was used for various purposes throughout history, including as a water supply system and a refuge during conflicts. Visitors to Narni Sotterranea can explore its fascinating features, such as medieval churches, Roman cisterns, and remnants of ancient walls. Guided tours provide insights into the historical significance of the site, making it a popular destination for those interested in archaeology and history.