In this article, you can find a list of underground cities around the world, some of which are publicly accessible. The underground cities are cities built under the surface of the earth, in caves, mines or …
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Showing: 1 - 1 of 1 RESULTS In this article, you can find a list of underground cities around the world, some of which are publicly accessible. The underground cities are cities built under the surface of the earth, in caves, mines or …