Alruna is one of the newest riverboats in the Viking River Cruises' fleet, and is pictured here in Speyer, Germany.
Alruna is one of the newest riverboats in the Viking River Cruises' fleet, and is pictured here in Speyer, Germany. Dave G. Houser TNS
Alruna is one of the newest riverboats in the Viking River Cruises' fleet, and is pictured here in Speyer, Germany. Dave G. Houser TNS

Currently popular: Europe river cruises

July 02, 2016 02:00 PM

UPDATED June 30, 2016 11:20 AM

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