Sinkhole: You have got to be $hitting me!!!

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thats all most of central america is ..one huge limestone formation. i dive and there are places called "cenotes"...limestone caves filled with fresh water. i have dove several cenotes and they can be quite deep, huge, and run for miles. if one caved in...well..you see what would happen.
 
Yeah you and your cenote would get flushed! I like mudpuppy's idea, fly a remote controlled airplane in there and lets see if its full of demons or some such stuff. That's some scary stuff there.
 
Yeah. Journey to the underground world!

This is an artificial sinkhole to prevent the river flood in Tokyo. Interesting to me, its structure is same as the natural ones.


 
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Free tour is available, Matt308.

Departs: Every Tuesday to Friday. 3 tours a day.
(Maximum number of tour participants : 25 people for each tour)
The 1st tour 10:00 - 11:30
The 2nd tour 13:00 - 14:30
The 3rd tour 15:00 - 16:30

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Governor of Tokyo Mr. Ishihara would be happy if no earthquake might not come against the rumour for these several decades. No construction designer expects no earthquake anyway.
Photo: Kobe 1995.
 

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