It has been 3 years since the last post in the cool/obscure places thread. Updates?

https://www.reddit.com/r/capstone/comments/rdt8v/has_anyone_found_any_cool_or_obscure_places_on/ For reference. Which places have been locked since then, or have had a camera installed? Has anything new been found? Adventuring in tunnels seems really cool but I checked a few places and they appear to have been sealed off.