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Tucked inside the Plaza Athénée on Avenue Montaigne, this Dior-branded spa is essentially the fashion world's decompression chamber. Models, editors, and people who genuinely own couture come here to recover between shows and shopping runs across the street. The treatments lean into Dior's skincare universe, the whole place feels like stepping inside an haute couture atelier, and the address alone does a lot of the heavy lifting.