city cooperative - via Grist | Can we turn mining pits into underground cities?
"Architect Matthew Fromboluti designed this inverted skyscraper to make use of abandoned open-pit mining operations in Bisbee, Ariz.  The 900-foot underground building (maybe we should call it a  mantle-scraper?) wouldn’t just be for residences — it would comprise an  entire self-sufficient subterranean city, including crops fed by  skylights.”

city cooperative - via Grist | Can we turn mining pits into underground cities?

"Architect Matthew Fromboluti designed this inverted skyscraper to make use of abandoned open-pit mining operations in Bisbee, Ariz. The 900-foot underground building (maybe we should call it a mantle-scraper?) wouldn’t just be for residences — it would comprise an entire self-sufficient subterranean city, including crops fed by skylights.”