In 2007 Ian Monroe was commissioned by Vienna Art Week to create a site specific intervention within the city of Vienna, Austria.
The project took the form of 100 mirrored Perspex blocks distributed along a specific route in the city. Each had a URL that guided the person who found them to a website that revealed the system by which they had been located, and also allowed them to be tracked.
As of September 2016, 6 blocks are still in their original locations.
The following photos include some of those blocks