Quinta Nova de Nossa Senhora do Carmo
Perched on the right bank of the Douro, this property is owned by the family that dominates Portugal's cork industry, but its Winery House hotel—part of the Relais and Châteaux network—is on an intimate scale: the elegant accommodations, lounge, and restaurant are all in the 18th-century main house. Non-guests may dine in the restaurant (set menus from €58), or book guided winery tours and tastings, which take place in English three or four times daily (from €30, for three reds and one port). You are also free to hike an 8-km (5-mile) marked trail that takes in a walled orchard and stones that from 1756 served to demarcate the Douro wine region (but non-guests must drop into reception first).