Image by Richard Cummins Getty Images

This 1968 landmark tower is an iconic feature of the Calgary skyline, though it has now been usurped by numerous taller buildings and is in danger of being lost in a forest of skyscrapers. There is little doubt that the aesthetics of this once-proud concrete structure have passed into the realm of kitsch, but, love it or hate it, the slightly phallic 191m structure is a fixture of the downtown area.

The views from the top are fantastic, and, copying Seattle's Space Needle, there's a revolving restaurant.