Home Learn DOCa (Denominacin de origen calificada) Decanter Staff November 11, 2010 The highest quality wine designation in Spain. Rioja was the first DO to be promoted. Written by Latest Wine News DWWA winners tasting in the heart of South Korea Historic Santorini vineyards struggle against climate change and tourism Burgundy 2024: What to expect from a topsy-turvy vintage Alto Adige: 24 expert-rated wines to try Decanter Festive Wine Guide: See 230 great buys for Christmas and New Year