De Haal, Oostzaan, Het Twiske was originally a Peat Lake created by the extraction of Laagveen. In the 1930s the area was intended to be reclaimed, but the quality of the agricultural land was too poor and the reclamation was stopped. In the 1960s, a 650 hectare recreation area was created..© 20 juni 2018 Marco van Middelkoop/Aerophoto-Schiphol