The Ijsselmeer is a large artificial lake in the central Netherlands, created in 1932 when the Afsluitdijk dam was built to enclose the Zuiderzee. It covers an area of about 1,100 square kilometers and is a popular destination for water sports, fishing, and tourism. The lake is surrounded by several towns, including Lelystad and Enkhuizen, which offer recreational activities and cultural attractions. The Ijsselmeer also plays a crucial role in flood control and water management in the region, helping to protect the surrounding areas from rising sea levels.