Which ship debuted Royal Caribbean's "Ultimate Abyss" slide?
Harmony of the Seas
Symphony of the Seas
Oasis of the Seas
Allure of the Seas
Answer
The "Ultimate Abyss" slide debuted on Harmony of the Seas. It is a 10-story-tall slide that takes riders on a thrilling journey from the top deck to the Boardwalk area below.
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