The 2022-built Wonder of the Seas cruise ship is the third RCI "Oasis-Plus" class liner, with sisterships Harmony OTS (2016), Symphony OTS (2018) and TBN OTS (2023). Wonder OTS just slightly exceeds in size the original Oasis-class vessels Oasis OTS (2009) and Allure OTS (2010). The vessel has a building cost of USD 1,35 billion (2019 shiporder rates).
Wonder OTS (GT 236857) and Symphony OTS (GT 228081) are currently the world's largest passenger ships by GT-gross tonnage/volume - followed by Harmony OTS (GT 226963). Wonder also has the new RCI "Family Suite" (2-level / on 2 decks), redesigned Boardwalk, several new venues.
In comparison to the other sisterships, Oasis-Plus Class boats are heavier, wider and with bigger passenger capacity. Wonder is nearly 330 ft (101 m) longer than RMS Titanic and 165 ft (50 m) longer than Eiffel Tower (Paris City). The liner has several promenades, 2x FlowRiders, 2x Rock-Climbing Walls, an Ice-Skating Rink, world's largest theatre at sea.
Among Wonder OTS' most prominent features is the multi-deck waterslide "The Ultimate Abyss". Introduced first on Harmony OTS, the waterslide swings down 10 decks, at over 150 ft (46 m) above sea level. Wonder is also the third Oasis-class liner with robot bartenders serving drinks at the Bionic Bar (introduced in 2014 on Quantum OTS). Wonder has bigger cabins than Allure and Oasis (in some categories) and windowless interior cabins (Virtual Balconies) offering real-time views (introduced in 2014 on Navigator OTS).