Re:Hitler’s Flak Towers Were Anti-Aircraft Castles
by icc97 on Tuesday June 30, 2015 @06:10AM
(#9804078)
Very interesting, one of the images [1] gives some good blue prints for the geek's version of a sand castle.
[1]: https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Fl...
https://en.wikipedia.org/wiki/Flak_tower