Uniworld’s Queen Isabel provides an up-close and unforgettable view of Portugal’s Douro River Valley—a designated UNESCO World Heritage Site—renowned for its dramatic, rugged scenery and pristine waters. Named after Portugal's beloved queen, this boutique 112-passenger vessel is the most unique and stately ship on the Douro, a wonderful place to admire the region’s steeply terraced hillside vineyards and charming wine estates Note: Cruising in Spain and Portugal is a wonderful experience, and while the Queen Isabel is a lovely and comfortable ship, its amenities may differ from those of a Uniworld company-owned ship.