Business park Achtersluispolder, Zaanstad, with the Dirk Metselaarhaven and the Isaac Baarthaven. Achtersluispolder is a diverse business park with a lot of vacancy, despite the harbours few water-related companies are established. There are plans to transform the area into a residential and working function..© 6 aug 2018 Marco van Middelkoop/Aerophoto-Schiphol