Commissioned by the city of Amsterdam, Tjep. has designed four towers forming the ventilation vents of the new Spaarndammer tunnel in the center of Amsterdam. The towers with a height of 6 meters each form an origami of filigrane patterns inspired by microscopic images of leaves. These emission points will be placed right at the heart of a new park above the tunnel. The glossy ornamental structures represent photosynthesis but also reflect the surrounding trees, mixing representation and subject into a prominent landmark for the newly developed area.

The towers are made of polished stainless steel and the triangles are designed in such a way that they form their own self supporting structure.

After two years of development and engineering the production of the towers has recently been started.