16. Harmony of the Seas – Sky-High Slides and Broadway Shows

Among the largest ships in the world, Harmony of the Seas is tailor-made for the adventurous spirit. One of its signature features is the Ultimate Abyss—a 10-story slide that delivers a heart-pounding descent. Not into adrenaline? Watch world-class divers perform acrobatics, or enjoy the Broadway musical Grease under the stars. Harmony offers themed “neighborhoods,” including one dedicated to wellness and another focused on nightlife. Cruising the Caribbean, this ship is ideal for those who want big thrills and big fun wrapped in serious luxury.