Ribera del Guadiana is one of Spain's newest wine regions. The Extremadura area, which borders Portugal, Andalucía, Castilla-La Mancha and Castilla y León, has a long history of winemaking. The area's only DO, Ribera del Guadiana, was not established until 1997, when Extremadura's six Vino de la Tierra regions were combined. Ribera del Guadiana's diverse terroirs and large list of approved grape varieties have given the region's winemakers a lot to work with. The resulting wines vary greatly in style and quality, but Ribera del Guadiana's winemakers have established a significant goal, to make high-quality wines in the modern style that reflect the uniqueness of Extremadura.