Akkadō
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For the asteroid, see 5679 Akkado.
Akkadō (安家洞), located in Iwaizumi, Iwate Prefecture in the Tōhoku region of northern Japan, is the longest limestone cavern in Japan, with a measured length of 23,702 metres (77,762 ft).[1] The cave system was designated as a Natural monument by the Japanese government in 1980. Since 1991, a portion of the caverns have been open to the public for part of the year.
Quick Facts Location, Coordinates ...
Akkadō | |
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安家洞 | |
Location | Iwaizumi, Iwate Prefecture, Japan |
Coordinates | 39°59′1.1″N 141°44′10.05″E |
Depth | 280 meters |
Length | 23,702 meters |
Geology | limestone |
Access | public |
Show cave length | 700 meters |
Website | Official website |
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