A previous life as an exploration geologist.
These are from 1) an old gold mine that “the company” was thinking about rehabilitating, 2) an old goldmine they had rehabilitated. See if you can spot the difference (hint: the services that run along the walls).
P.S. I was always the straggler, taking photos of anything but rocks… sometimes rocks.
P.P.S. Photos chosen for lack of identifying features.