6 of the Most Impressive Underground Structures Around the World
Posted in: Architecture
On December 24, 2020

Underground structures often stand out among architectural masterpieces as being some of the most incredible structures. That’s because it takes even more work to build underground structures than it does to build above-ground structures; it’s common for underground structures to require even more planning and construction than above-ground structures. Here are six of the most impressive man-made underground structures.

Deepest Subway Station: Arsenala Station, Ukraine | 346 Feet Deep


source: travelblogeurope.com

If you’ve ever been on the New York metro, you’ve probably had the experience of going underground, but not nearly as much as Arsenala Station. The deepest subway station in the NYC subway system is only 173 feet underground, which is half as deep as Arsenala Station. Arsenala is on top of a mountain, but the stations that surround Arsenala Station are at ground level. The easiest way the construction team found to deliver people to Arsenala was to cut directly through the mountain, leaving the station over 300 feet below ground.

Deepest Basement: Sydney Opera House, Australia | 120 Feet Deep


source: thesun.co.uk

Most people focus on the architecture of the Sydney Opera House’s main buildings, which are truly a wonder. However, not many people know that the parking garage underneath the Sydney Opera House technically creates the world’s deepest basement. Rather than being an underground square, however, this parking garage is actually a series of underground curves. This is because they had to meet fire escape regulations, which required them to make smart design choices that led to a truly gorgeous parking garage design.

Longest Underground Tunnel: Gotthard Base Tunnel, Switzerland | 35 Miles Long


source: nbmcw.com

The Swiss Alps are well-known for being some of the most gorgeous mountains in Europe, and the Gotthard Base Tunnel transports many people through it. This tunnel, which was opened in 2016, is actually the first to create a completely flat route through the Alps. To create this totally flat railway, the construction team had to excavate around 28 million tons of rock, made up of some 73 different types of rock. The deepest point is 8,040 feet below the surface.

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Deepest Building Foundation: Salesforce Tower, United States | 310 Feet Below Grade


source: skyrisecities.com

Salesforce Tower isn’t the tallest building in the United States, even though it sits at a whopping 1,070 feet tall, but it does have the deepest foundation. This foundation is nearly a third of the height of the building because of the tendency for earthquakes in San Francisco. It includes a 14-foot-thick concrete slab that reaches nearly an acre wide. It also set new benchmarks for seismic safety overall.

Biggest Underground City: Derinkuyu, Turkey | 18 Stories Deep


source: pinterest.com

Underground architecture is not in any way a modern fad. As a matter of fact, cities underneath Turkey, including the miles of city tunnels under Derinkuyu, dates back to 1200 B.C. In 1963, a Turkish man accidentally discovered this once-thriving underground city when he knocked down a wall in his basement and found a tunnel that allowed entrance. Over the following years, people discovered over 600 entrances all throughout the Cappadocia area.

Deepest Underground Research Center: Jinping Underground Laboratory, China | 7,900 Feet Deep


source: washingtontimes.com

Doing research on ultra-sensitive physics concepts can be difficult because these physics experiments are so sensitive that cosmic radiation can actually interfere with the results. In an attempt to negate this interference, some scientists have started doing research underground; one mile underground reduces the cosmic noise by a factor of 10 million. In Jinping, the 7,900 feet of depth allows for easier experiments. Plus, it’s in the center of a mountain, which means that people can simply drive to the underground laboratory.


Underground structures tend to be incredibly captivating simply because they’re so difficult to get right. It can be difficult to figure out the perfect underground structure, but when it’s completed, people tend to be completely taken by these structures. From amateurs to experts, people love to look at these architectural marvels at The Architecture Designs.

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