The Johann Strauss, a 144-passenger river ship, cruises the Rhine and Danube rivers on charter for several smaller river cruise companies, including U.S.-based newcomer Teeming River Cruises. Constructed in 2006 (it was formerly known as The Sound of Music) and last refurbished in 2017, the ship is comfortable and well maintained, with six categories of cabins and suites, a restaurant, a lounge, and a sun deck. It wasn’t designed to dazzle, but pleasant décor in shades of blue and beige (the dated musical motifs that are a carryover from its former life notwithstanding) create an inviting setting for Teeming’s value-focused cruises.