Cathédrale Notre-Dame d'Amiens
Cathedral located in Somme, in France.
Each edition grades its towns against each other only.

Châteaux or heritage sites make up 11 of the 19 places on the list. Longueau itself has none of them. Make a day of it at Musée de Picardie, 5 km away.
After Cathédrale Notre-Dame d'Amiens, look out for 2 abbeys, 2 museums and an attraction.
AttractionCathédrale Notre-Dame d'Amiens4.8 km northwest, in AmiensAttractionAttractionTour Perret4.3 km northwest, in AmiensAbbeyAbbeyAbbaye de Saint-Acheul2.8 km northwest, in Amiens
MuseumMusée de l'Hôtel de Berny4.7 km northwest, in Amiens
MuseumMaison de Jules Verne4.5 km northwest, in AmiensAbbeyAbbeyAbbaye de Saint-Fuscien4.7 km southwest, in Saint-FuscienBest 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.
The map shows most of the 19 nearby to the northwest.
The first 20 on the list, numbered as below. The shape is the commune of Longueau; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
11 are châteaux or heritage sites; other sights come next with 4.
Dark: in Longueau. Light: in the communes within 5 km of its centre.
You will find all 19 within 5 km of its centre.
Cathedral located in Somme, in France.
Museum about the history of Amiens, France.
Convent located in Somme, in France.
Episcopal palace located in Amiens, in Somme, in France.
Abbey located in Somme, in France.
Convent located in Somme, in France.
Convent located in Somme, in France.
Religious building located in Amiens (France).
Convent located in Somme, in France.
Nothing is mapped in Longueau itself; these are within 5 km of its centre.
Of the 11 day trips, Musée de Picardie (5 km) is the best known.
MuseumMusée de Picardie5 km northwest, in AmiensAbbeyAbbeyAbbaye Saint-Pierre de Corbie12 km east, in CorbieAttractionAttractionCratère Lochnagar29 km northeast, in Ovillers-la-BoisselleAttractionAttractionMémorial de Thiepval31 km northeast, in AuthuilleTheme parkTheme parkParc Samara15 km northwest, in La Chaussée-TirancourtChâteauChâteauChâteau de Bertangles12 km north, in BertanglesMuseumMuseumCentre Sir John Monash11 km east, in FouilloyAbbeyAbbeyAbbaye Saint-Vaast de Moreuil14 km southeast, in MoreuilAttractionAttractionMémorial à la 38e division galloise33 km northeast, in Carnoy-MametzAttractionAttractionMémorial de Pozières31 km northeast, in Ovillers-la-Boisselle
MuseumMusée des tramways à vapeur et des chemins de fer secondaires français35 km southwest, in Crèvecœur-le-GrandPlaces within 40 km of Longueau with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Longueau itself, but within 5 km there are Cathédrale Notre-Dame d'Amiens, Tour Perret, Abbaye de Saint-Acheul and Musée de l'Hôtel de Berny.
4 museums and galleries in town or within 5 km, including Musée de l'Hôtel de Berny, Maison de Jules Verne, Musée des Hortillonnages and Maison des Hortillonages.
The nearest with articles in both French and English Wikipedia: Musée de Picardie (5 km), Abbaye Saint-Pierre de Corbie (12 km), Cratère Lochnagar (29 km), Mémorial de Thiepval (31 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 Longueau, 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.