Set among the picturesque vineyards of Spain's Duero Valley and the stone architecture of a 12th-century abbey awaits a spa sanctuary fit for a true connoisseur. At Abadía Retuerta's renowned Santuario spa and wellness center, guests can tap into the relaxation expertise of an exclusive Spa Sommelier who designs treatments and thermal experiences tailored to each guest and paired with a blind wine and essential oil tasting. Named the Best Luxury Historical Spa in Europe by the World Luxury Spa Awards, Santuario is one experience that should be on every spa-lovers bucket list.