Take a tour around the world by checking out some of the biggest and most fascinating man-made underground structures! Underground structures can sometimes be even more incredible than above-ground structures. After all, while appropriately building both structures can be difficult, underground structures often have to deal with even more serious problems, including hydrostatic pressure and the sheer weight of any earth that may lie on top of the structure. Here are six incredible underground structures that have gone against that difficulty. Deepest Subway Station: Arsenala Station, Kyiv, Ukraine | 346…
The Biggest and Most Interesting Man-Made Underground Structures
