Where was The Perils of Gwendoline in the Land of the Yik-Yak filmed?

1984 film by Just Jaeckin

The Perils of Gwendoline in the Land of the Yik-Yak (1984) was filmed in Boulogne-Billancourt, Les Baux-de-Provence, Carrières de Lumières and Billancourt Studios, 4 places named in its Wikipedia article, in France. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data