Crystal Serenity: 19-Night Northern Europe from London (Southampton)

Zeebrugge is a North Sea port about 15 km from Bruges, one of Europe's best-preserved medieval cities. Ships dock at Zeebrugge, but the destination is Bruges: a city of 120,000 people whose medieval center survived the centuries virtually intact because the city's commercial importance faded after the Zwin river silted up in the 15th century, and nobody had a reason to tear anything down.

Tromsø is northern Norway's largest city and a major Arctic cruise hub, located about 350 kilometers north of the Arctic Circle at 69° north latitude. The city sits on the small island of Tromsøya, connected to the mainland and neighboring islands by bridges and undersea tunnels.

Reykjavik cruise port is Iceland's capital and the primary cruise hub for Arctic and North Atlantic itineraries. Most cruise ships dock at Skarfabakki (Old Harbor), about 2.