Super-K is located 1,000m underground in the Mozumi Mine in Hida city, Gifu, Japan.
It consists of 50,000 tons of pure water surrounded by about 11,200 photomultiplier tubes.
The cylindrical structure is 41.4 m tall and 39.3 m across.
Along with looking like something out of Event Horizon, Super-K was built to detect the properties of neutrinos by observing them with extreme precision.

You can find a lot more about Super-Kamiokande, as well as full-resolution images at their official site.



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