Musée des tramways à vapeur et des chemins de fer secondaires français
Railway museum in Butry-sur-Oise, Val-d'Oise.
Each edition grades its towns against each other only.

From Le Gallet, the big name within reach is Cathédrale Notre-Dame d'Amiens, 33 km away. Nothing is mapped in Le Gallet, but 2 places to visit are within 5 km of its centre. They include a museum and a château.
Then comes a château, behind Musée des tramways à vapeur et des chemins de fer secondaires français.
MuseumMusée des tramways à vapeur et des chemins de fer secondaires français2.5 km southwest, in Crèvecœur-le-GrandChâteauChâteauChâteau de Crèvecœur-le-Grand3.1 km southwest, in Crèvecœur-le-GrandBest 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.
At 3.1 km, Château de Crèvecœur-le-Grand is the farthest one out.
The first 20 on the list, numbered as below. The shape is the commune of Le Gallet; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
It comes down to a museum and a château.
Dark: in Le Gallet. Light: in the communes within 5 km of its centre.
Both on the list lie within 5 km of its centre.
Railway museum in Butry-sur-Oise, Val-d'Oise.
Nothing is mapped in Le Gallet itself; these are within 5 km of its centre.
The history of Le Gallet → · Parks and trails in Le Gallet →
Cathédrale Notre-Dame d'Amiens, at 33 km, heads the 12 day trips.
AttractionCathédrale Notre-Dame d'Amiens33 km northeast, in Amiens
AttractionCathédrale Saint-Pierre de Beauvais22 km south, in Beauvais
MuseumMusée de Picardie32 km northeast, in AmiensAttractionAttractionTour Perret33 km northeast, in AmiensAttractionAttractionAbbaye Saint-Germer-de-Fly31 km southwest, in Saint-Germer-de-FlyTheme parkTheme parkParc Samara36 km north, in La Chaussée-Tirancourt
MuseumMusée départemental de l'Oise22 km south, in Beauvais
MuseumMusée de l'Hôtel de Berny33 km northeast, in AmiensAbbeyAbbeyAbbaye de Saint-Martin-aux-Bois35 km east, in Saint-Martin-aux-BoisAbbeyAbbeyAbbaye de Saint-Acheul33 km northeast, in AmiensAbbeyAbbeyAbbaye de Marcheroux36 km south, in Beaumont-les-NonainsAbbeyAbbeyAbbaye Saint-Vaast de Moreuil32 km northeast, in MoreuilPlaces within 40 km of Le Gallet with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Le Gallet itself, but within 5 km there are Musée des tramways à vapeur et des chemins de fer secondaires français and Château de Crèvecœur-le-Grand.
One, in town or within 5 km: Musée des tramways à vapeur et des chemins de fer secondaires français.
The nearest with articles in both French and English Wikipedia: Cathédrale Notre-Dame d'Amiens (33 km), Cathédrale Saint-Pierre de Beauvais (22 km), Musée de Picardie (32 km), Tour Perret (33 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 Le Gallet, 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.