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Yes, and it's being worked on right now. The Above Below project aims to take a disused mine in Arizona and convert it into a underground building. The terraces of the mine will be covered by a la...
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#1: Attribution notice removed
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System
·
2020-06-01T14:13:46Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/23378 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/