Boissy-l’Aillerie sits on the Viosne in Île-de-France, where the river’s narrow valley cuts through the farmland of the French Vexin. The commune lies in the Val-d’Oise department, northwest of Paris, within the Vexin français Regional Natural Park, an area of open fields, small woods and long-established settlement routes. The parish church of Saint-André marks the historic centre, while the Viosne valley connects the community with nearby Pontoise. A station on the Pontoise–Gisors railway line links Boissy-l’Aillerie to the wider Paris region without erasing its rural character. Browse other webcams across the French Vexin and Île-de-France to place this setting in a wider geographic context.
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