Quinta de Couselo sits at the southern tip of Rias Baixas in tiny O Rosal, just across the Minho from Portugal, on land that has produced wine since the Cistercians arrived in the 12th century. Valdamor is their sister label of single-varietal Albarino, sourced with the Atlantic right at its back. This is the electric, saline expression of the grape that wins converts for life: linear, citrus-driven, and built for the sea. Pour it the moment the oysters arrive.