Your clients will be singing your praises for booking them on European Waterways’ Opera Cruise, sailing Aug. 20-27 from Venice to Mantua, Italy. The 8-day land and sea adventure begins with a visit to the Arena Muse Opera museum in Verona, followed by dinner in a courtyard restaurant at the Palazzo Forti and a front-row performance of Georges Bizet’s “Carmen” at the Arena di Verona Roman amphitheater. The next day, guests board the La Bella Vita luxury hotel barge for a 6-day, all-inclusive cruise, featuring stops in Venice, to see the Gran Teatro La Fenice opera house, where composers such as Rossini and Verdi have performed; Ferrara, a city where guests will find the 14th century Estense Castle with its moat, drawbridges and marble balconies; and Mantua, a Renaissance city that is home to the 14th century Ducal Palace, which houses 15 gardens and courtyards, a museum, basilica, intricate frescoes, the Gallery of Mirrors and the palatial Rivers Room. Rates start at $3,490 pp dbl. For more information, visit gobarging.com.