guarantee of region of origin of a wine

As we mentioned below, Terra Alta is a region without a guarantee of region of origin. If you want to know a bit more about the Denominaciones de origen, here is a definition:

DENOMINACIÓN DE ORIGEN Originally designed as a guarantee of the place of origin and quality of wine, the Denominación de Origen is now also used for other products such as cheeses, olive oil, fruit and meat, especially where the production of a particular region is highly regarded (as in the case of olive oil from Jaén, Manchego cheese, or Jabugo cured ham). EU law now regulates the use of such labeling.

Spain has numerous denominaciones, the most famous may be Rioja and Ribera del Duero. In my region (Valencia-Alicante) we have 2 main relevant: Utiel-Requena and Marina Alta. By the way, all these places are faboulous gastromic vacation destinations!