The Waddenzee vastelandskust, or mainland coast of the Wadden Sea, is a designated coastal water body along the North Holland province in the Netherlands. This area is part of the larger Wadden Sea, a UNESCO World Heritage site and one of the world's largest tidal flat systems. The vastelandskust is a "strongly modified" water body, reflecting significant human influence on its natural state. It is a polyhaline environment, meaning it has moderate salinity, and is generally sheltered compared to the more open central Wadden Sea. The coastline features extensive salt marshes, known as kwelders, which are crucial intertidal habitats. The entire ecosystem is dominated by the dramatic daily ebb and flow of the tides, which expose vast mudflats and create a rich feeding ground for marine life, making it a unique and productive destination for anglers targeting saltwater species.