Getting ready for a cruise? Here’s what you need to know for 2018 …

River or ocean cruise? Viking is marrying the two with combo voyages. Hop on one of the company’s river ships from Basel, Switzerland, to Amsterdam, for instance, and then do an ocean cruise from Amsterdam to Bergen, Norway, a 15-day itinerary featuring the Black Forest, fiords and castles. Another option gets you from Basel to Barcelona, Spain, in 18 days.