11 Astonishing Underground Cities Around The World, From Derinkuyu To Coober Pedy

Published September 28, 2023

Orvieto Underground: The City That Lies Beneath Orvieto, Italy

Orvieto Above Ground

Umbria Lovers/Flickr Creative CommonsOrvieto, Italy sits on the summit of a flattened volcanic bluff, which was dug into to create an underground city.

In ancient times, historians believe, the Etruscans established a city reportedly known as Velzna on top of a volcanic bluff. The location afforded them ample defense, but it came with a host of problems too — namely, that their water source was far down below on the plains beneath the bluff.

To remedy this situation, the Etruscans dug deep wells into the bluff along with chambers and cisterns to collect rainwater, allowing them to resist Roman siege for nearly two years. Unfortunately, according to Atlas Obscura, in 264 B.C.E., the Romans prevailed, and the city ultimately fell.

The Romans saw the potential in what the Etruscans had begun, however, and they kept digging. Above ground, the city of Orvieto continued to rise skyward, but beneath the dirt, its inhabitants carved out tunnels to serve different purposes, including shelters, quarries, grottoes, and galleries.

Orvieto's Underground City

Michael Kogan/Flickr Creative CommonsRoughly 1,200 structures were dug into the volcanic rock beneath Orvieto.

One carved-out room even housed a massive olive press, millstones, furnaces, structures for storage, and troughs for animals doing labor. Some tunnels connected to nobles’ houses to provide them easy access out of the city, should invading forces arrive unexpectedly.

In total, roughly 1,200 structures were dug out beneath the city of Orvieto — though it seems as if that number will not be growing any higher in the years to come, as the city has officially banned any further digging in the underground tunnels, barring archaeological activities.

author
Austin Harvey
author
A staff writer for All That's Interesting since 2022, Austin Harvey has also had work published with Discover Magazine, Giddy, and Lucid, covering topics including history, and sociology. He has published more than 1,000 pieces, largely covering modern history and archaeology. He is a co-host of the History Uncovered podcast as well as a co-host and founder of the Conspiracy Realists podcast. He holds a Bachelor's degree from Point Park University. He is based in Pittsburgh, Pennsylvania.
editor
Jaclyn Anglis
editor
Based in Brooklyn, New York, Jaclyn Anglis is the senior managing editor at All That's Interesting, where she has worked since 2019. She holds a Master's degree in journalism from the City University of New York and a dual Bachelor's degree in English writing and history from DePauw University. In a career that spans 11 years, she has also worked with the New York Daily News, Bustle, and Bauer Xcel Media. Her interests include American history, true crime, modern history, and science.
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Harvey, Austin. "11 Astonishing Underground Cities Around The World, From Derinkuyu To Coober Pedy." AllThatsInteresting.com, September 28, 2023, https://allthatsinteresting.com/underground-cities. Accessed July 26, 2025.