abandoned
accident
building
cave
cave collapse
copper
corridor
danger
danger well
dangerous work
dark
death
decadent
deep
dungeon
engineering
excavation
exploration
extraction
geology
hole
industry
inside
iron
lack of security
light
limestone
metal
mine
miner
mining
night
occupation
old
passage
rail
railroad
rock
rust
safety
security
shaft
shopping
silicosis
silver
spooky
stone
subway
time
track
trolley
tunnel
tunnels
underground
water
wet
work