Pinner wrote ; Art Deco Pool, La Piscine, a splendid Art Deco building in Roubaix, part of greater Lille, houses the Musée d’Art et d’Industrie. It’s one of the most exciting surprises in the Nord region, housing an impressive collection of 19th- and 20th-century art. Originally a swimming pool, now an eclectic museum that I enjoyed visiting. Shall find some more images to make a set.
The plunge pool is a proper organic pool (natural swimming pool), only smaller. And this one is small enough to fit in a modest garden to bring the delights of plunging into organic water to more of us. (Click image for FAQs & instruction for making one.)