Oostvaardersplassen is a nature reserve located in the Netherlands, specifically in the province of Flevoland. Established in 1986, it covers approximately 56 square kilometers and is known for its unique wetland ecosystem, which includes marshes, grasslands, and shallow lakes. The area is home to a variety of wildlife, including birds, deer, and Konik horses, which were introduced to help maintain the landscape. The reserve is part of the larger Nieuw Land National Park and serves as an important habitat for migratory birds. It attracts nature enthusiasts and researchers interested in studying its diverse flora and fauna. The management of the area aims to balance conservation efforts with public access and enjoyment.