Grottes de Calès
The site is accessible, but visitors are advised not to go beyond the metal barriers due to the risk of falling rocks (beware of the weather).
Each edition grades its towns against each other only.

Nothing to visit is mapped in Sénas, but 5 places are within 5 km of its centre. The commonest are 3 attractions and 2 châteaux. Travel 32 km and you reach Palais des papes.
The rest of the best known are 2 châteaux and 2 attractions.
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.
The map puts most of the 5 to the south.
The first 20 on the list, numbered as below. The shape is the commune of Sénas; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
Other sights lead the count with 3; 2 are châteaux or heritage sites.
Dark: in Sénas. Light: in the communes within 5 km of its centre.
Nothing is inside Sénas itself; these 5 are within 5 km of its centre.
The site is accessible, but visitors are advised not to go beyond the metal barriers due to the risk of falling rocks (beware of the weather).
Nothing is mapped in Sénas itself; these are within 5 km of its centre.
The standout of the 12 is Palais des papes, 32 km from town.
AttractionPalais des papes32 km northwest, in AvignonAttractionAttractionPont d'Avignon32 km northwest, in Avignon
AttractionTerrasse du café le soir37 km west, in ArlesAttractionAttractionLa Nuit étoilée37 km west, in ArlesAttractionAttractionAbbaye Notre-Dame de Sénanque22 km north, in GordesAttractionAttractionExsurgence de Fontaine-de-Vaucluse20 km north, in Fontaine-de-Vaucluse
CathedralCathédrale Notre-Dame-des-Doms d'Avignon32 km northwest, in Avignon
Archaeological siteArènes d'Arles37 km west, in ArlesAttractionAttractionAncienne cathédrale Saint-Trophime à Arles37 km west, in ArlesAttractionAttractionMonastère Saint-Paul-de-Mausole20 km west, in Saint-Rémy-de-Provence
CathedralCathédrale Saint-Sauveur d'Aix-en-Provence38 km southeast, in Aix-en-Provence
AttractionMausolée de Glanum20 km west, in Saint-Rémy-de-ProvencePlaces within 40 km of Sénas with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Sénas itself, but within 5 km there are Grottes de Calès, Château de Roquemartine, Platane géant de Lamanon and Ancienne carrière.
No museum or gallery is mapped in Sénas or within 5 km.
The nearest with articles in both French and English Wikipedia: Palais des papes (32 km), Pont d'Avignon (32 km), Terrasse du café le soir (37 km), La Nuit étoilée (37 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 Sénas, 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.