Giezen was commissioned by the IFLA to search for the essence of The Hague Stream and make a proposal for a new perception of the stream. He proposed purification, where he mainly uses elements that where already there. It emerged that the 7,5 kilometers long course was a relocated, unnatural and canalized watercourse with no visible source and that it was heavily polluted and contaminated.
Adding the least possible, using what is available on the spot, rearranging already existing elements, combining future building activities and art at an early stage.
Krijn Giezen has made visible the source of the Haagse Beek, a stream running through The Hague and flowing out into the Hofvijver, in the middle of the city centre.