What: Sleek white-marble annex by architect Álvaro Siza Vieira at one of Portugal's most charming grand hotels, with 20 treatment rooms and a superb spa menu featuring therapies with waters from the Vidago source.
The look: Marble is softened by votive candles and gentle lightingthe effect is more sensual shrine than Euro clinic.
Who goes: Gorgeous honeymooners, sexy second wives who don't golf (the Palace has one of Portugal's best courses), arty types from Oporto.
The treatment: The reviving 160-minute Ultimate Vidago Experience includes a lavender-and-rosemary-scented bath in Vidago water, a stress-releasing massage, and a detox facial.
P.S.: Ask for Julianaher sweet personality belies her amazingly powerful digits.