Kicking off Crystal Cruises' new Crystal River Cruises division, the 154-passenger Crystal Mozart is the largest and most deluxe river cruise ship plying European waters. Twice the width of the standard river vessel, its itineraries are limited to the Danube River between Passau, Germany, and Budapest, Hungary, where the locks are large enough to accommodate its 395-by-75-foot hull. Built in 1987 and dubbed “The Queen of European Rivers,” and previously owned by Peter Deilmann Cruises, it was completely gutted to the steel framework in early 2016. During the refit, it was given a mechanical overhaul and redesigned from stem to stern with all new, lavish public areas and spacious accommodations.