The Olenderski Olandia Open-Air Museum is a historic manor and park complex located in the village of Prusim, founded in 1386 by the Prusimski family, within the picturesque landscape of the Sierakowski Landscape Park. The history of the estate dates back to the late 18th century when it passed from the Szczaniecki family to Andrzej Odrowąż Wilkoński and later to General Robert Taylor. After World War II, the estate was nationalized, and in 2004, it returned to private ownership. The revitalization, completed in 2012, restored its former glory, transforming the farm buildings into functional hotel and recreational facilities. A key element is the Manor House, which dates back to around 1730, with its 19th-century reconstruction adding classical elements. The open-air museum also features an Old Mill from 1847, a granary, a lime kiln, and a Frisian barn, all reflecting the history of German settlement in the region. Olandia is a living monument to Olęder heritage, showcasing the influence of Olęder settlement on the Polish economy. It opened on July 30, 2010, and has since gained popularity thanks to various attractions, such as traditional Olęder costumes, agricultural equipment, and a unique "Holender" type windmill relocated from Mazovia. Olandia aims to promote Olęder culture through workshops, presentations of Olęder architecture, and a mini-zoo preserving traditional animal breeds. The facility also offers recreational infrastructure, including a beach, sports fields, and a playground.