Launched in 2008, Scenic Diamond is one of the oldest ships in the Scenic river cruise fleet, but underwent a $10 million renovation in 2013 (along with sisters Sapphire, Emerald, Ruby, and Pearl). Sailing the Rhine, Danube, and Moselle Rivers, Scenic Diamond has some roomy digs on the water — including suites with sunrooms as balconies — and modern amenities such GPS-enabled tour headsets and TVs with Mac Minis, all up to par with Scenic's newer ships.