Each edition grades its towns against each other only.
This is a list led by châteaux or heritage sites, 4 of its 6. None of them is inside Serques itself. Beyond the town, the best known is Cathédrale Notre-Dame de Saint-Omer, 6.2 km off.
2 châteaux, an abbey and a ruin follow Blockhaus d'Éperlecques.
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.
Look to the north for most of the 6 just outside.
The first 20 on the list, numbered as below. The shape is the commune of Serques; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
4 are châteaux or heritage sites; museums or galleries come next with 2.
Dark: in Serques. Light: in the communes within 5 km of its centre.
You will find all 6 within 5 km of its centre.
Second World War bunker complex in the Pas-de-Calais department of northern France, built by Nazi Germany between March 1943 and July 1944 to serve as a launch base for V-2 rockets directed against London and southern England.
Nothing is mapped in Serques itself; these are within 5 km of its centre.
Allow a day for Cathédrale Notre-Dame de Saint-Omer, 6.2 km away, the pick of 12.
CathedralCathédrale Notre-Dame de Saint-Omer6.2 km southeast, in Saint-OmerAbbeyAbbeyAbbaye Saint-Bertin6.4 km southeast, in Saint-OmerFortFortV332 km west, in Landrethun-le-NordAttractionAttractionCoupole d'Helfaut10 km south, in HelfautAttractionAttractionCap Blanc-Nez38 km northwest, in SangatteMuseumMuseumForteresse de Mimoyecques32 km west, in Landrethun-le-NordAttractionAttractionMont Cassel20 km east, in CasselTheme parkTheme parkDennlys Parc25 km south, in DennebrœucqAbbeyAbbeyAbbaye Saint-Winoc de Bergues25 km northeast, in Bergues
MuseumFort des Dunes34 km northeast, in LeffrinckouckeAttractionAttractionDuchesse Anne30 km northeast, in Dunkerque
MuseumCité internationale de la dentelle et de la mode de Calais30 km northwest, in CalaisPlaces within 40 km of Serques with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Serques itself, but within 5 km there are Blockhaus d'Éperlecques, Abbaye de Watten, Château d'Écou and Tour de l'Abbaye Notre-Dame du Mont.
2 museums and galleries in town or within 5 km, including Blockhaus d'Éperlecques and Maison des Archers.
The nearest with articles in both French and English Wikipedia: Cathédrale Notre-Dame de Saint-Omer (6.2 km), Abbaye Saint-Bertin (6.4 km), V3 (32 km), Coupole d'Helfaut (10 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 Serques, 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.