Sandworm is an organic structure/space/creature realized on the dunes of the Wenduine coastline, Belgium. The 45 meters long and 10 m wide and high installation moves freely in-between architecture and environmental art and is constructed entirely out of willow following the local knowledge of a continuing interaction between work and environment. Casagrande worked hard with his team of young architects and local experts for 4 weeks in order to create something that he describes as "weak architecture" - a human made structure that wishes to become part of nature through flexibility and organic presence.

"Inside the sandworm you are greeted by a natural spectacle of light and shadow. I was amazed. How you can create such beauty with such simple natural materials. The artist believes that architectural control goes against nature and thus also agains architecture. The built human environment is a mediator between human nature and nature itself. To be part of this, man must be weak. To the Finnish artist Marco Casagrande designing is not sufficient. Design should not replace reality. The building must grow out of the location, it must react to its environment, it must be a reflection of life and also be itself, as every other living being."

• Peter Beyen

Designing is not sufficient. Design should not replace reality. The building must grow out of the location; it must react to its environment, it must be a reflection of life and also be itself, as every other living being. Architectural control goes against nature and thus also against architecture. The built human environment is a mediator between human nature and nature itself. To be part of this, man must be weak.