The largest drain hole in the world
Located in northern California, the Monticello Dam’s is the largest morning glory spillway all over the world. This funnel-shaped outlet, allows water to bypass the dam when it reaches capacity, as it swallows a rate of 48,400 cubic feet per second (1370 m³/s). The distance from the funnel to the exit point - which is situated in the south side of the canyon - is about 700 feet. This type of spill
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http://deputy-dog.com/2007/09/16/impact-craters-on-earth/
é©šãã¹ã7ã¤ã®ç©´ (7 amazing holes) - deputydog
カナダã®ãƒ€ã‚¤ã‚¢ãƒ¢ãƒ³ãƒ‰é‰±å±± Diavik 2006 Photos
Blue Hole in Belize
https://www.dagbladet.no/nyheter/bakken-kollapset-og-slukte-hus/66311644
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