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Erpent is a sub-municipality of Ottignies-Louvain-la-Neuve, located in Belgium's Walloon Brabant province. It is one of the eight sub-municipalities that make up the larger municipality, along with Ottignies, Louvain-la-Neuve, Céroux-Mousty, Limelette, Genval, Lasne, and Rixensart. Erpent is known for its picturesque landscapes, including the Bois de Lauzelle and the banks of the Dyle River.