I've been on 105-day cruises, but this 13-day one was the toughest. Its itinerary had a major flaw I'll avoid on future trips.

As a frequent cruiser, I've been on a few port-heavy itineraries, but none hit me quite as hard as Norwegian Cruise Line's 13-day Asia cruise last fall. The cruise departed from Keelung in northeast… [+3466 chars]