Peter Eisenman's Berlin/Holocaust memorial Light and Shadow. I like the way the structure of the building creates strong impressions of light and dark. Also the juxtaposition between the natural and man-made forces interests me.
The nearby LightRails tunnel! American artist Bill FitzGibbons has sent us photos of a light sculpture he created called LightRails. It is located at the Street underpass in downtown Birmingham, Alabama and is composed of a computerized LED light system.