A sinkhole,
also known as a cenote, sink, sink-hole, shakehole,
swallet, swallow hole, or doline (the different terms
for sinkholes are often used interchangeably), is a
depression or hole in the ground caused by some form
of collapse of the surface layer. - Wikipedia
Some Sinkholes
are natural, some are manmade, due to tunnels and mining.
Please read the links below to learn more.
Sinkhole in Guatamala
City
Information from
the National Geographic
https://www.nationalgeographic.com/environment/sinkhole/
From the Guardian
https://www.theguardian.com/world/2013/mar/04/what-causes-sinkholes-florida-man
Sinkhole in Harrisburg
Sinkhole in India
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