A stunning art deco swimming pool (originally belonging to neighbouring Hôtel Lutetia, no less) now houses luxury label Hermès’ inaugural concept store. Retaining its original mosaic tiles and iron balustrades, the vast, tiered space showcases new directions in home furnishings, including fabrics and wallpaper, along with classic lines such as its signature scarves. Its cafe, Le Plongeoir (the Diving Board), is equally chic.