Netherlands, Terschelling, Het Groene Strand. After the sandbank Noordsvaarder had grown attached to the island in 1866, a new row of dunes was created parallel to the old dunes. Behind it a new valley was created, which turned into a trench to the south. The sea still had access when the water was high, so it became a salt marsh area: the Green Beach..© 1 juli 2018 Marco van Middelkoop/Aerophoto-Schiphol