The ms Westerdam is the third in Holland America Line's series of Vista-class ships. As such, she embraces the latest industry and environmental technologies such as her use of a diesel-electric power plant for optimal energy efficiency and an Azipod propulsion system. Most of her staterooms have ocean views and many have private verandahs.

The theme of ms Westerdam's art collection is Dutch heritage in the New World. Art ranges from paintings of historic Dutch ships, such as Henry Hudson's Half Moon, to a huge Indian silver-overlaid wood palace doorway, a bone tobacco pipe carved in the shape of a woman's head to a collection of 5,000-year-old pre-Columbian carved limestone figures from Ecuador. Contemporary pieces include an original Andy Warhol portrait and signature sculptures by Sedona artist Susanna Holt.