Willemstad is located on the important Hollandsch Diep river arm, which is connected to the Rhine and the Maas and is an important shipping route from Rotterdam to Antwerp. The town is built in a sea clay polder that was created in the sixteenth century. This polder was named "Polder de Ruigenhil" and there are still some beautiful creek remnants. The surroundings of Willemstad are extensive, the highlight being the Buitengorzen salt marsh area. The Buitengorzen consists of land outside the dykes, where meadows, partly wet bushes, reed beds and wild pilot whales predominate. Nature has been able to take its course in the pilot whales and bushes. Many different plant species bloom abundantly, including pouffe, marsh marigold, large spring seed, bitter field cherry and marshmallows. The quiet area is an Eldorado for birds: the great and small reed warbler, warbler warbler and reed bunting like to nest here and greylag goose, white-fronted goose, lapwing and golden plover regularly return to forage for food. The route starts at Profile Zevenbergen. Here you get a discount of no less than 10 euros on maintenance and repairs when you show your bicycle discount pass, so this is an excellent opportunity to give your bike a little maintenance before you leave and set course for the river for a beautiful view over the Hollandsch Diep. . Fort Bovensluis was built between Klundert and Willemstad. Fort Bovensluis, which was built in 1861-1862, is located on the Hollandsch Diep. The fort, together with Fort de He, which you will see further on, had to provide cover on the back of Fort de Ruijter. The fortress was surrounded by wet moats and could be entered via a postern. Within the fort was a barracks where 188 men could be housed. In 1953 the fort was sold and from then on the barracks building was used as a potato cooling house. In 1965 a campsite was built near the fort and to this day the fort is the beautiful center of the Bovensluis recreation park. The Mauritshuis (museum) is located in the small town of Willemstad. The Mauritshuis was built by order of Count Johan Maurits van Nassau-Siegen. The construction took place during the time that Johan Maurits stayed in Brazil as governor of the Dutch colony. In 1644 he went to live in the house. He really did not live there for long. After three years he left for Cleves, where he had been appointed stadtholder. After his departure, the house had various functions. In the early nineteenth century it was put into use as a museum. Less than a kilometer from the museum is also d Orangemolen, a circular stone flour mill built on this site in 1734 to replace a post mill. This predecessor was built elsewhere in Willemstad in 1584 and brought to this place in 1589. The mill was still in operation until 2008, but due to problems with the bearing of the king pivot, the mill had to be stopped. Today the mill is inhabited. On the way and from the next sight you can see the many wind turbines of Windpark Hellegatsplein. The tall structures tower high above the water. The sight of so much technical ingenuity put together will undoubtedly be on your retina. Finally you come to Fort De Hel, which is part of the Defense Line of the Hollandsch Diep and the Volkerak. The French built the fort in 1811 and then called it "l 'Enfer". The fort was intended to provide back cover for the Sabina Henrica fort, which was built nearby. After the departure of the French, this fort also got a Dutch name: De Hel. In the Second World War, the fort was occupied by the Germans. In 1988 the fort was declared a monument.