Chartreuse de Bourgfontaine
Carthusian monastery located in Aisne, in France.
Each edition grades its towns against each other only.

Nothing on our list is in Boursonne; the 4 places to visit are within 5 km of its centre. The commonest are 3 châteaux and a monastery. Further afield lies Château de Pierrefonds, at 17 km.
Next to Chartreuse de Bourgfontaine, the best known are 3 châteaux.
Best known first: by how many Wikipedia and sister-site articles cover each place (Wikidata’s count). It isn’t a ranking of how good they are.
Head to the north for most of the 4 on the list.
The first 20 on the list, numbered as below. The shape is the commune of Boursonne; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
Every one of them is among châteaux or heritage sites.
Dark: in Boursonne. Light: in the communes within 5 km of its centre.
These 4 are within 5 km of its centre, none in town.
Nothing is mapped in Boursonne itself; these are within 5 km of its centre.
The history of Boursonne → · Parks and trails in Boursonne →
Château de Pierrefonds, at 17 km, heads the 12.
ChâteauChâteau de Compiègne29 km northwest, in CompiègneAttractionAttractionCathédrale Saint-Gervais-et-Saint-Protais de Soissons28 km northeast, in SoissonsAttractionAttractionCathédrale Saint-Étienne de Meaux30 km southwest, in Meaux
CathedralCathédrale Notre-Dame de Senlis34 km west, in Senlis
MuseumMusée Alexandre-Dumas6.4 km northeast, in Villers-Cotterêts
MuseumCamp de Royallieu28 km northwest, in CompiègneMonastery or conventMonastery or conventAbbaye royale de Notre-Dame et Toussaints de Chaalis27 km west, in Fontaine-ChaalisAbbeyAbbeyAbbaye Saint-Jean-des-Vignes28 km northeast, in Soissons
AbbeyAbbaye royale de Saint-Médard de Soissons29 km northeast, in SoissonsChâteauChâteauChâteau de Villers-Cotterêts6.8 km northeast, in Villers-CotterêtsPlaces within 40 km of Boursonne with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Boursonne itself, but within 5 km there are Chartreuse de Bourgfontaine, Manoir de Coyolles, Manoir du Plessis au Bois and Château dit « Château Neuf ».
No museum or gallery is mapped in Boursonne or within 5 km.
The nearest with articles in both French and English Wikipedia: Château de Pierrefonds (17 km), Parc Astérix (35 km), Château de Compiègne (29 km), Cathédrale Saint-Gervais-et-Saint-Protais de Soissons (28 km).
From OpenStreetMap and Wikidata: named museums, galleries, châteaux, abbeys, gardens, zoos, theme parks and other visitor attractions whose mapped point lies inside the commune of Boursonne, then those in the communes within 5 km of its centre, and well-known places within 40 km. Houses, ruins and gardens need a sign they’re open to visitors; places marked private, closed or disused are left out. The historic-monument link is the Culture ministry’s Mérimée record. A place that isn’t mapped isn’t listed, so this isn’t everything there is to see.
Sources: OpenStreetMap (© OpenStreetMap contributors, ODbL), Wikidata (CC0: descriptions, websites, Wikipedia articles), the Culture ministry’s Mérimée database (Licence Ouverte 2.0), IGN commune boundaries. Distances are from the commune’s centre point.
Photos from Wikimedia Commons, each under its own licence (our copy, resized).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.