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

Most of what there is to see is châteaux or heritage sites: 4 of 5. Cassen itself has none of them. Cathédrale Notre-Dame de Dax lies 16 km out, the pick for a day trip.
Then come 3 châteaux and a garden, behind Église Saint-Vincent-Diacre de Vicq-d'Auribat.
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.
Château du Rau marks the outer edge, 4.6 km away.
The first 20 on the list, numbered as below. The shape is the commune of Cassen; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
The biggest group is châteaux or heritage sites, with 4 of the 5.
Dark: in Cassen. Light: in the communes within 5 km of its centre.
Look within 5 km of its centre for all 5.
Nothing is mapped in Cassen itself; these are within 5 km of its centre.
Cathédrale Notre-Dame de Dax (16 km) leads the 12 big names within reach.
Monastery or conventAbbaye de Saint-Sever23 km east, in Saint-SeverChâteauChâteauChâteau de Bellocq27 km south, in BellocqChâteauChâteauChâteau de Moncade31 km south, in OrthezChâteauChâteauChâteau de Montréal31 km southwest, in PeyrehoradeChâteauChâteauChâteau de Morlanne38 km southeast, in MorlanneChâteauChâteauChâteau de Gaujacq17 km southeast, in GaujacqChâteauChâteauChâteau de Castillon28 km north, in ArengosseChâteauChâteauDonjon Lacataye33 km northeast, in Mont-de-MarsanChâteauChâteauChâteau de Candale19 km southeast, in DoazitChâteauChâteauChâteau Bellegarde20 km north, in Rion-des-Landes
MuseumMusée d'art et d'histoire du Cap de Gascogne23 km east, in Saint-SeverPlaces within 40 km of Cassen with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Cassen itself, but within 5 km there are Église Saint-Vincent-Diacre de Vicq-d'Auribat, Château de Poyanne, Arboretum des Sabla Rots and Château de Hon.
No museum or gallery is mapped in Cassen or within 5 km.
The nearest with articles in both French and English Wikipedia: Cathédrale Notre-Dame de Dax (16 km), Abbaye de Saint-Sever (23 km), Château de Bellocq (27 km), Château de Moncade (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 Cassen, 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.