Rivière souterraine de Labouiche
Subterranean river in France with evidence of Paleolithic culture.
Each edition grades its towns against each other only.

Nothing to visit is mapped in Saint-Martin-de-Caralp, but 5 places are within 5 km of its centre. The mix takes in 3 attractions, an abbey and a monastery. Beyond the town, Château de Foix sits 5.7 km away.
Then come 2 attractions, an abbey and a monastery, behind Rivière souterraine de Labouiche.
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.
Head to the north for most of the 5 on the list.
The first 20 on the list, numbered as below. The shape is the commune of Saint-Martin-de-Caralp; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
3 other sights and 2 châteaux or heritage sites top the count.
Dark: in Saint-Martin-de-Caralp. Light: in the communes within 5 km of its centre.
These 5 are all within 5 km of its centre.
Nothing is mapped in Saint-Martin-de-Caralp itself; these are within 5 km of its centre.
The history of Saint-Martin-de-Caralp → · Parks and trails in Saint-Martin-de-Caralp →
Allow a day for Château de Foix, 5.7 km away, the pick of 12.
MuseumChâteau de Foix5.7 km southeast, in FoixArchaeological siteArchaeological siteGrotte de Niaux19 km south, in NiauxAttractionAttractionChâteau de Montségur27 km southeast, in MontségurMuseumMuseumGrotte du Mas-d'Azil18 km northwest, in Le Mas-d'AzilCathedralCathedralCathédrale Saint-Antonin de Pamiers15 km north, in PamiersChâteauChâteauChâteau de Roquefixade18 km east, in RoquefixadeMonastery or conventMonastery or conventAbbatiale Saint-Volusien5.8 km southeast, in FoixAttractionAttractionGrotte de Lombrives20 km south, in UssatCathedralCathedralCathédrale Saint-Lizier de Saint-Lizier33 km west, in Saint-LizierChâteauChâteauChâteau de Miglos22 km south, in Miglos
CathedralCathédrale Saint-Maurice de Mirepoix29 km east, in MirepoixChâteauChâteauChâteau de Lagarde33 km east, in LagardePlaces within 40 km of Saint-Martin-de-Caralp with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Saint-Martin-de-Caralp itself, but within 5 km there are Rivière souterraine de Labouiche, Abbaye Notre-Dame du Pesquié, Grotte du Portel and Monastère du Carol.
No museum or gallery is mapped in Saint-Martin-de-Caralp or within 5 km.
The nearest with articles in both French and English Wikipedia: Château de Foix (5.7 km), Grotte de Niaux (19 km), Château de Montségur (27 km), Grotte du Mas-d'Azil (18 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 Saint-Martin-de-Caralp, 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.