Our Pick
Posted on @rawstates
Bingham Canyon Mine
1906
Oquirrh Mountains, Utah
Farragutful · CC BY-SA 4.0 · Wikimedia Commons
The largest human-made excavation on Earth, nearly a kilometre deep and four kilometres across, visible from orbit. A town of 15,000 was mined away entirely to make it, and in 2013 the largest non-volcanic landslide in modern North American history fell into the pit.
That was 1 of the hidden places.
Location: documented spot
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