Yes, Symphony of the Seas features a signature zipline that is one of the most popular high-adrenaline activities on board. Suspended nine decks above the Boardwalk neighborhood, the zipline allows passengers to fly across the open-air center of the ship, stretching roughly 82 feet from one side of the aft to the other. The experience is entirely complimentary for cruise guests and offers a unique vantage point of the AquaTheater and the moving carousel below. To ride, guests must follow a specific dress code (closed-toe shoes are mandatory, and hair must be tied back) and meet certain height and weight requirements. Because it is a high-demand activity, it is wise to visit the zipline on Deck 16 early in the cruise or during port days when the ship is less crowded. It remains a hallmark of Royal Caribbean’s Oasis-class design, providing a thrilling outdoor adventure right in the middle of the ocean.