Are there thousands of tunnels under the United States?

“There are way more tunnels underground wherever you are in the United States than you would imagine. There are just crazy layers of infrastructure, whether they be active or abandoned transportation tunnels, sewer lines, aqueducts or even military or government infrastructure hidden underground,” Hunt said.



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Butte underground city, Montana These are well-preserved relics from the early 20th century, when mining was at its height and the population swelled to around 100,000. Space was at a premium so people started using underground areas connected by tunnels. Today, you can usually visit on a subterranean tour.

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Subterranean London refers to a number of subterranean structures that lie beneath London. The city has been occupied by humans for two millennia. Over time, the capital has acquired a vast number of these structures and spaces, often as a result of war and conflict.

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Dingess Tunnel has been called “America's Bloodiest Tunnel” due to stories from the late 1800s/early 1900s of immigrant and African-American coal miners and railroad employees being murdered while traveling through the tunnel (Appalachian Magazine, 2014.)

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Also known as the Cobble Hill tunnel, the half-mile Atlantic Avenue tunnel is not only the oldest subway tunnel in NYC but also the world. Running beneath Brooklyn's Atlantic Avenue, it was first built in 1844 and was sealed off in 1861.

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