The exhibition Vijfhoek, of the artist Gerard Ortín, presents the homonymous project developed at Diemer Vijfhoek in 2015. Vijfhoek is a green area in Diemen, municipality east of Amsterdam. It is a pentagonal artificial peninsula grown as the result of sand mining that took place in the seventies in order to build dikes to protect the power plant supplying electricity to the east of Amsterdam and Diemen. The artist organized a walk-performance across the peninsula to explore the notion of toxicity in nature through a tactile walk across the rough nettle fields. A guide accompanied the participants and gave them some guidelines for the tour and information about the history of the place and its surroundings, which had been used as a chemical dump.