Remember when lightning struck the Salt Lake City Mormon Temple a couple years ago, and the Angel Moroni fell off? Apparently, that's not the whole story; the whole temple nearly fell. They are now semi-secretly rebuilding it (they are calling it "renovations"), and the workers found a giant network of tunnels underneath the temple.
Start at 11:15 in this video: https://www.youtube.com/watch?v=YDf_ymNRk6E
u/Zadok is correct. I’m a member of the Church of Jesus Christ. Know several people who’ve been in those tunnels. Most active members are aware of them. They’re for transportation.
The renovations are due to the old construction not being earthquake ready - and the Wasatch front being overdue for a massive earthquake (possibly originating near Yellowstone).
I get it. Some people are not a fan of the church. We try to live the sort of life Christ lived. Try being the key word.