Several odd structures around and in this pond.
If you zoom in using Google Earth it appears that the numbers next to the building on the northwest edge of the pond read 4.15 2.16.
Kim Il Sung Birthday -- Palace (?)
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© Bing Maps
By AlbinoFlea @ 2005-09-26 18:20:01
(updated 2013-04-04)
http://en.wikipedia.org/wiki/Kim_Il-sung
February 16 (2.16) is the birthday of Kim Jong Il.
http://en.wikipedia.org/wiki/Kim_Jong-il
Interesting... then what is this? Some sort of private retreat house?