Abbaye Notre-Dame de la Joie
Monastery located in Oise, in France.
Each edition grades its towns against each other only.

The 5 places on the list are all châteaux or heritage sites. Couloisy itself has none of them. Further afield, Château de Pierrefonds is 6.7 km from the centre.
The rest of the best known are 4 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.
Furthest from the centre is Abbaye Notre-Dame de la Joie, 4.5 km away.
The first 20 on the list, numbered as below. The shape is the commune of Couloisy; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
They are all châteaux or heritage sites: 5 in all.
Dark: in Couloisy. Light: in the communes within 5 km of its centre.
Everything here is within 5 km of its centre, 5 places in all.
Nothing is mapped in Couloisy itself; these are within 5 km of its centre.
Château de Pierrefonds, at 6.7 km, heads the 12.
ChâteauChâteau de Compiègne14 km west, in CompiègneAttractionAttractionCathédrale Notre-Dame de Noyon20 km north, in NoyonChâteauChâteauChâteau de Coucy25 km northeast, in Coucy-le-Château-AuffriqueAttractionAttractionCathédrale Saint-Gervais-et-Saint-Protais de Soissons22 km east, in Soissons
MuseumCamp de Royallieu16 km west, in Compiègne
CathedralCathédrale Notre-Dame de Senlis38 km southwest, in SenlisAttractionAttractionClairière de l'Armistice9.2 km west, in CompiègneAbbeyAbbeyAbbaye Saint-Jean-des-Vignes22 km east, in Soissons
AbbeyAbbaye royale de Saint-Médard de Soissons23 km east, in SoissonsMuseumMuseumWolfsschlucht II28 km east, in Margival
MuseumMusée national de la voiture et du tourisme14 km west, in CompiègnePlaces within 40 km of Couloisy with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Couloisy itself, but within 5 km there are Abbaye Notre-Dame de la Joie, Château de Cuise, Château de Berneuil and Château de l'Ortois.
No museum or gallery is mapped in Couloisy or within 5 km.
The nearest with articles in both French and English Wikipedia: Château de Pierrefonds (6.7 km), Château de Compiègne (14 km), Cathédrale Notre-Dame de Noyon (20 km), Château de Coucy (25 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 Couloisy, 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.