This reminds me of the relatively nearby Kansas City Subtropolis, which was similarly converted for warehouse and light industry use. These places always intrigue me, not only for being awesome underground spaces but because they offer the best analogs on Earth for what actual space settlements are most-likely to be like. I’ve long wanted to use them for a kind of home & garden show of the future where people could experiment with their own ideas about living in subterranean space settlements.
Space/SciFi media is always implausibly depicting space settlement as either high-tech Airstreams in the desert or Levittown-Under-Glass. But, realistically, actual settlement has to make the most of minimally processed local materials and the use of robotics --no one is building much by hand out there. Excavations outfit by retrofit is one of the most straightforward approaches to in-situ resource utilization for habitat construction. It doesn’t demand extreme precision or sophistication from your robots and if you can achieve the kinds of spans you see in these places on Earth, imagine how much larger those spans could be on the Moon and Mars. Real settlements need lots of room to grow --literally. You’re not sustainably living out there with a tin can army base with a few pop-up plug-in greenhouses --and who could ever call an army base home? The village or town whole is the likely minimum settlement scale (think of the Circus in Bath or the Nahal moshev, all underground) with farming/gardening the primary activity, providing food, industrial products (plants are an at-hand nanotechnology), supporting atmosphere, and helping create an aesthetically pleasing habitat. So it’s underground places like these that probably offer a more plausible impression of life in space than anything NASA or SciFi typically show us.