Running along the Duero River on Spain’s high central plateau, Ribera del Duero makes some of the country’s most powerful and sought-after reds. The brutal climate, with scorching days and frigid nights at high elevation, stresses the vines into producing intensely concentrated fruit. Tempranillo is the near-exclusive grape, yielding dark, structured wines built for the long haul. It sits comfortably alongside Rioja as a benchmark for Spanish red, with a bolder, more muscular style all its own.