From Trier, Germany's oldest city, to Seville's centuries-old gateway to the Americas, five European river cruises worth choosing over the Danube

From a Douro port wine cruise through Portugal to an 18-day Danube journey through the Wachau Valley's riesling country, Europe's best wine cruises

From Trier, Germany's oldest city, to Seville's centuries-old gateway to the Americas, five European river cruises worth choosing over the Danube