Following on from the previous post about OMA's Boompjes project from 1980, here is the amazing image of the observation tower that formed part of the scheme. The tower is a pure Constructivist monument, a homage to Leonidov and El Lissitzky. Compare it to Lenin Tribune design of El Lissitzky from 1924.
As this article on the fantastic Russian Utopia site puts it:
The tribune designed by El Lissitzky became an icon of the Modernist movement. Leninism became a dogma. When both were subjected to revision, it became clear that invigoration socialism was more difficult than updating Modernism.
If you don't find this worms-eye axonometric view of a Constructivist tower in Rotterdam totally awesome, then you're probably reading the wrong blog.