Some comparison/contrast observations:
|Walls are smooth, natural in appearance||Walls are rough, chunky, evidence of tools used|
|Wet, dripping water, mud, pools of water||Dry, dusty|
|Warm, humid (80°F+)||Cold, dry (47°F)|
|Flowstone, stalactites, stalagmites, soda straws||Wooden supports, metal bolts, tools|
|Bats, guano, crickets, ground sloth||Evidence of human(oid) activity|
One key idea -- without light you are doomed!!!
Here are some pics I found online of the two places. Enjoy!
THE COPPER QUEEN MINE