Parc de sculptures Engelbrecht
Monumental sculptures from Erich Engelbrecht.
Each edition grades its towns against each other only.

With nothing in Mercy, the list has 3 places within 5 km of its centre. Look for 2 châteaux and a garden. A longer outing takes you to Cathédrale Notre-Dame-de-l'Annonciation de Moulins, 19 km off.
The list goes on from Parc de sculptures Engelbrecht to 2 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.
To the southeast is where most of the 3 lie.
The first 20 on the list, numbered as below. The shape is the commune of Mercy; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
The biggest group is châteaux or heritage sites, with 2 of the 3.
Dark: in Mercy. Light: in the communes within 5 km of its centre.
Look within 5 km of its centre for all 3 places listed.
Nothing is mapped in Mercy itself; these are within 5 km of its centre.
Of the 12 day trips, Cathédrale Notre-Dame-de-l'Annonciation de Moulins (19 km) is the best known.
CathedralCathédrale Notre-Dame-de-l'Annonciation de Moulins19 km northwest, in MoulinsTheme parkTheme parkLe Pal9.4 km northeast, in Saint-Pourçain-sur-BesbreChâteauChâteauChâteau de Billy26 km south, in Billy
MuseumMusée Anne-de-Beaujeu20 km northwest, in MoulinsAttractionAttractionYukon Quad9.3 km northeast, in Saint-Pourçain-sur-BesbreMonastery or conventMonastery or conventPrieuré clunisien de Souvigny27 km west, in Souvigny
MuseumMaison Mantin19 km northwest, in Moulins
MuseumCentre national du costume et de la scène20 km northwest, in MoulinsAttractionAttractionChâteau de La Palice25 km south, in LapalisseChâteauChâteauChâteau de Saint-Aubin-sur-Loire21 km northeast, in Saint-Aubin-sur-LoireChâteauChâteauChâteau de Chareil-Cintrat32 km southwest, in Chareil-CintratGardenGardenArboretum de Balaine34 km northwest, in Villeneuve-sur-AllierPlaces within 40 km of Mercy with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Mercy itself, but within 5 km there are Parc de sculptures Engelbrecht, Château de la Cour-en-Chapeau and Château des Fougis.
No museum or gallery is mapped in Mercy or within 5 km.
The nearest with articles in both French and English Wikipedia: Cathédrale Notre-Dame-de-l'Annonciation de Moulins (19 km), Le Pal (9.4 km), Château de Billy (26 km), Musée Anne-de-Beaujeu (20 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 Mercy, 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.