Book Crystal Mozart and Crystal Mahler 2022 Sailings Crystal Mozart and Crystal Mahler. Crystal Mozart will set sail next year with the industry’s first dedicated suites for solo travelers, available with no single supplement. Travelers can now book an array of new itineraries including Crystal Mozart’s convenient seven-night Danube Dreams & Discoveries round-trip from Vienna and new Christmas and New Year’s sailings. Aboard Rhine & Moselle Summer Escapes sailings between Amsterdam and Trier; 10-night fall Splendors of the Rhine & Moselle voyages between Amsterdam and Basel; 14-night Magnificent Europe sailings between Amsterdam and Budapest on the Rhine, Main and Danube rivers; and a 10-night