De Streken is a tribute to Joop Mulder, the founder of Oerol. He passed away on January 10, 2021. His ideas will continue to exist in future editions of Oerol and in de Streken, a landscape artwork by Marc van Vliet. The organization honors founder Joop Mulder with the realization of this fantastic building. The work has been built on the dike near Oosterend, and will remain in place during the summer months until September 16. For Joop, De Streken was an iconic work from which you can experience the Wadden landscape in a special way. It was therefore his dream to give it a permanent place on the Wadden coast. This dream has now become reality. This monument can be seen annually from the summer to September 16 at Oosterend. It is planned to be rebuilt every summer. By donating, you help ensure that De Streken can also be seen and visited on Terschelling in the summer months in the coming years. "If your dreams don't scare you, they aren't big enough" - Joop Mulder.