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. 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.The visitors are describing the Sandworm as a willow cathedral finely tuned to celebrate the site specific conditions of the Wenduine tidal beaches. The space is used for picnics, relaxation and post industrial meditation. “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. To the Finnish artist Marco Casagrande designing is not sufficient. 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.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.” Sandworm is made entirely from willow without any nails or other industrial connectors.