- Jaw Droppingly Beautiful Underground Japanese Observatory : The Super-K is a neutrino observatory in Japan; it is 1000 meters underground, contains a lake of 50,000 tons of pure water & every inch of the the 41 meter high walls are lined with over 11,000 photomultiplier tubes. [Pics] http://www-sk.icrr.u-tokyo.ac.jp/sk/gallery/index-e.html 35 comments science
- Super-K Neutrino Observatory (very large pic) http://www-sk.icrr.u-tokyo.ac.jp/sk/gallery/fullrecon/ph20-water-withboat-apr23.jpg 2 comments reddit.com