Explore details about location Willem Alexanderplantsoen. Willem Alexanderplantsoen is a location situated within the Rijnsburg alongside other areas such as Waterbospad, Valkenburgerweg, Freesiastraat. Additionally, some smaller parts of Willem Alexanderplantsoen include specific areas like Mauritsplantsoen, Populierenlaan, Oegstgeesterweg adding to the diversity of its landscape.