Subterranean secrets: World's creepiest underground marvels

Updated 21st December 2017
Subterranean secrets: World's creepiest underground marvels
Written by Thomas Page, CNN
Ever had a tube journey from hell? How about a tube journey into hell -- or out of it, depending on which way you're traveling. Stockholm's underground is a bastion of subterranean design, and Radhuset metro station provides the Dante's Inferno of commutes.
It's cavernous interior, deep rouge and magma-like, may not require Virgil to navigate, but there's definitely a satanic charm to the 1970s design.
It's one of many underground marvels to be found throughout the world. From a theme park in a Romanian mine to a cathedral 660 feet below Colombia, there's a host of incredible spots deep within terra firma waiting to be explored.
Click the gallery below and let CNN Style take you on a journey to five continents, by way of ancient cities and Cold War boltholes. We hope you're not scared of the dark.
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