Ouvrage de Boussois
Military fortification in the Fortified Sector of Maubeuge.
Each edition grades its towns against each other only.

The commune has no place on our list of its own; 4 are within 5 km of its centre. Among them are 3 forts and a museum. A longer outing takes you to Abbaye de Maubeuge, 7.4 km off.
Following Ouvrage de Boussois are 2 forts and a museum.
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.
On the map, most of the 4 sit to the west.
The first 20 on the list, numbered as below. The shape is the commune of Marpent; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
3 of the 4 are châteaux or heritage sites, more than any other kind.
Dark: in Marpent. Light: in the communes within 5 km of its centre.
Here are the 4 places within 5 km of its centre.
Nothing is mapped in Marpent itself; these are within 5 km of its centre.
Allow a day for Abbaye de Maubeuge, 7.4 km away, the pick of 11.
FortFort de Leveau9.7 km west, in FeigniesAbbeyAbbeyAbbaye de Crespin33 km northwest, in Crespin
MuseumMusée des Arts et de l'Archéologie de Valenciennes40 km west, in ValenciennesAbbeyAbbeyAbbaye de Maroilles29 km southwest, in MaroillesAbbeyAbbeyAbbaye de Montreuil-les-Dames31 km south, in RocquignyFortFortOuvrage d'Eth30 km west, in EthPlaces within 40 km of Marpent with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Marpent itself, but within 5 km there are Ouvrage de Boussois, Musée de la mémoire verrière, Fort Cerfontaine and Ouvrage de Rocq.
One, in town or within 5 km: Musée de la mémoire verrière.
The nearest with articles in both French and English Wikipedia: Abbaye de Maubeuge (7.4 km), Ouvrage de La Salmagne (5.3 km), Ouvrage de Bersillies (6.4 km), Abbaye de Hautmont (12 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 Marpent, 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.