Greenwich, London

The Viking Sky makes its final dock at Greenwich, which is not only a charming town along the Thames river, but boasts a cherished maritime history. At the port, the clipper ship Cutty Sark, one of Greenwich's most renowned historic landmarks, is preserved as a fascinating museum. A short walk will take you to the Royal Observatory, where the world's longitude is measured from the prime meridian and Greenwich Mean Time sets the global time standard. For more information: VIKING OCEAN CRUISES