Église Saint-Vincent-Diacre de Vicq-d'Auribat
Church located in Landes, in France.
Each edition grades its towns against each other only.

For a trip from Onard, Cathédrale Notre-Dame de Dax is 19 km away. Look within 5 km of its centre for the 2 places to visit; none is in Onard.
Second to Église Saint-Vincent-Diacre de Vicq-d'Auribat is a château.
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.
Out at 3 km is Château de Poyanne, the farthest.
The first 20 on the list, numbered as below. The shape is the commune of Onard; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
Every one of them is among châteaux or heritage sites.
Dark: in Onard. Light: in the communes within 5 km of its centre.
These 2 are all within 5 km of its centre.
Church located in Landes, in France.
Nothing is mapped in Onard itself; these are within 5 km of its centre.
Out of town, Cathédrale Notre-Dame de Dax (19 km) leads 12 names to know.
Monastery or conventAbbaye de Saint-Sever21 km east, in Saint-SeverChâteauChâteauChâteau de Bellocq30 km south, in BellocqChâteauChâteauChâteau de Moncade32 km south, in OrthezChâteauChâteauChâteau de Castillon26 km north, in ArengosseChâteauChâteauChâteau de Morlanne38 km southeast, in MorlanneChâteauChâteauChâteau de Montréal34 km southwest, in PeyrehoradeChâteauChâteauChâteau de Gaujacq17 km south, in GaujacqChâteauChâteauDonjon Lacataye30 km northeast, in Mont-de-MarsanChâteauChâteauChâteau de Candale18 km southeast, in DoazitChâteauChâteauChâteau Bellegarde18 km north, in Rion-des-Landes
MuseumMusée d'art et d'histoire du Cap de Gascogne21 km east, in Saint-SeverPlaces within 40 km of Onard with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Onard itself, but within 5 km there are Église Saint-Vincent-Diacre de Vicq-d'Auribat and Château de Poyanne.
No museum or gallery is mapped in Onard or within 5 km.
The nearest with articles in both French and English Wikipedia: Cathédrale Notre-Dame de Dax (19 km), Abbaye de Saint-Sever (21 km), Château de Bellocq (30 km), Château de Moncade (32 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 Onard, 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.