The cruise line acquired the ship upon its launch in 2023, one of five former Crystal Cruises vessels.
Riverside subsequently chartered the ship out to Uniworld Boutique River Cruises, which has operated her as Elisabeth for the past three-and-a-half years.
Mahler will sail for Riverside for the first time when she returns to the fleet, joining sister ship Riverside Debussy on the Rhine, Main, Moselle, and Danube rivers, introducing new routes and specialty themed sailings.
The line also operates Riverside Mozart and Riverside Ravel, which specialise in the Danube and Southern France respectively.
“Introducing Mahler gives us the opportunity to take everything we’ve built so far and apply it to the Rhine in new, creative ways – more access, more flexibility, and a fresh take on a river everyone thinks they already know,” chief executive Jennifer Halboth said.
“As demand for true luxury river cruising continues to grow, this expansion allows us to build on our commitment to delivering an exceptional, highly personalised experience while honouring the legacy of these remarkable ships,” she added.
Riverside is aiming to offer a new level of luxury travel not yet seen by Australian guests, according to recently appointed country manager Stewart Williams.
