Arnot Power Station, Middelburg, South Africa.
〔image source 2010-02-04 http://en.wikipedia.org/wiki/File:South_Africa-Mpumalanga-Middelburg-Arnot_Power_Station01.jpg 〕
The James S McDonnell Planetarium building at the
St. Louis Science Center.
“Water tower in Ciechanów, Poland. Designed by Jerzy Michał Bogusławski; built in 1972. The support structure is an hyperboloid lattice and the water reservoir is a toroid.”.
〔image source 2010-02-06 http://en.wikipedia.org/wiki/File:Ciechanow_water_tower.jpg 〕