The Eco-Cathedral by Le Roy

Thirty years ago, he started his experiment known as the Ecokathedraal in the Dutch town of Mildam, a project that was open-ended in terms of time. At the basis of this experiment was the three-fold question posed by Nobel Prize winner, Ilya Prigogine: Ilya Prigogine: "What can nature do, what can living humans do, and what are living organisms capable of"?
 
Le Roy wondered what a single person could do and then set about to find out by doing something himself. On a four-hectare site, he started planting in a completely random manner. The signing of a contract with the municipal government was followed by having road workers dump their residual materials at the site for several years. Le Roy processed this material by hand without any outside assistance. The result was the building of assorted structures, low walls, pathways and towers that due to their ingenious construction could serve as purification plants for acid rain.