Thanks for the video, it's nothing short of mesmerising! With these long, hair thin mushrooms and metal spikes, it looks straight out of an old survival/adventure video game :lol:
By the way, I've got a couple colleagues who'd be interested to visit some mines in the UK, and we were looking at Wales due to the history of the region.
https://tranio.com/rent/united-kingdom/wales/detached/ Of course, we're looking at something high end-ish in terms of comfort, since our wives and kids want calm countryside holidays while the fathers go for underground shenanigans!