7Castillo de Peñafiel (Valladolid)

Stretching across a narrow ridge in Spain’s wine-rich Ribera del Duero region, Castillo de Peñafiel is shaped like a massive stone ship.

Built in the 10th century and expanded in later centuries, the fortress is as strategic as it is beautiful. Today, it houses the Provincial Wine Museum, blending history with the area’s famed viticulture. Visitors can admire panoramic views from the battlements before sampling some of the region’s finest wines nearby.