Cathédrale Saint-Gervais-et-Saint-Protais de Soissons
Cathedral located in Aisne, in France.
Each edition grades its towns against each other only.

Most of what there is to see is châteaux or heritage sites: 11 of 19. Billy-sur-Aisne itself has none of them. At 29 km, Cathédrale Notre-Dame de Laon is worth the journey.
Close behind Cathédrale Saint-Gervais-et-Saint-Protais de Soissons are 3 abbeys, a château and a museum.
AbbeyAbbaye royale de Saint-Médard de Soissons4 km northwest, in SoissonsAbbeyAbbeyAbbaye Saint-Jean-des-Vignes4.7 km northwest, in SoissonsAbbeyAbbeyAbbaye Notre-Dame de Soissons4.7 km northwest, in SoissonsChâteauChâteauChâteau de Septmonts3 km southwest, in Septmonts
MuseumMusée de Soissons5 km northwest, in SoissonsBest 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.
To the northwest lie most of the 19 nearby.
The first 20 on the list, numbered as below. The shape is the commune of Billy-sur-Aisne; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
Châteaux or heritage sites number 11, other sights 6.
Dark: in Billy-sur-Aisne. Light: in the communes within 5 km of its centre.
19 places, all within 5 km of its centre, make the list.
Cathedral located in Aisne, in France.
Abbey located in Aisne, in France.
Abbey located in Aisne, in France.
Nothing is mapped in Billy-sur-Aisne itself; these are within 5 km of its centre.
The history of Billy-sur-Aisne → · Parks and trails in Billy-sur-Aisne →
Cathédrale Notre-Dame de Laon, at 29 km, heads the 12 day trips.
AttractionCathédrale Notre-Dame de Laon29 km northeast, in LaonChâteauChâteauChâteau de Coucy19 km north, in Coucy-le-Château-AuffriqueChâteauChâteauChâteau de Pierrefonds29 km west, in PierrefondsMuseumMuseumWolfsschlucht II10 km north, in MargivalAttractionAttractionCathédrale Notre-Dame de Noyon37 km northwest, in NoyonAttractionAttractionAbbaye de Prémontré21 km north, in PrémontréFortFortFort de Condé7.2 km northeast, in Condé-sur-Aisne
AttractionChâteau de Fère-en-Tardenois19 km southeast, in Fère-en-TardenoisAbbeyAbbeyAbbaye Saint-Martin de Laon28 km northeast, in Laon
MuseumMusée Alexandre-Dumas24 km southwest, in Villers-Cotterêts
Art galleryMusée Jean-de-La-Fontaine35 km south, in Château-ThierryMonastery or conventMonastery or conventAbbaye Saint-Vincent de Laon28 km northeast, in LaonPlaces within 40 km of Billy-sur-Aisne with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Billy-sur-Aisne itself, but within 5 km there are Cathédrale Saint-Gervais-et-Saint-Protais de Soissons, Abbaye royale de Saint-Médard de Soissons, Abbaye Saint-Jean-des-Vignes and Abbaye Notre-Dame de Soissons.
One, in town or within 5 km: Musée de Soissons.
The nearest with articles in both French and English Wikipedia: Cathédrale Notre-Dame de Laon (29 km), Château de Coucy (19 km), Château de Pierrefonds (29 km), Wolfsschlucht II (10 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 Billy-sur-Aisne, 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.