Hang ten as many times as you want on FlowRider, the 40-foot-long wave simulator on Freedom-, Oasis-, and Quantum-class ships — unlimited rides are included in your fare. You’ll catch the waves on the more than 30,000 gallons of water that flow into the simulator per minute while you surf or body board in front of a stadium of fans.

Royal Caribbean's three Oasis-class ships have the only zip lines at sea, and you can zoom 82 feet across the deck — a trip that takes 20 seconds. It's a thrill to get a bird’s-eye view of the Boardwalk nine decks below. You can ride the onboard zip line as many times as you want for no extra charge. If you want even more zip lining, Royal Caribbean's private island, Labadee, has a 2,600-foot-long zip line, but that comes with a whopping $98 charge.

Harmony of the Seas debuted in 2016 with the 10-story Ultimate Abyss, the tallest — and most thrilling — slide at sea. Towering 150 feet above deck, the twisting twin slides are not for the faint of heart: passengers brave enough to take the plunge drop 100 feet in just 12 seconds.

Head to the SeaPlex activity center on Quantum-class ships for all the crashing and driving you can stand. The cars are first come, first served and rides last for three to five minutes, but you can line up as many times as you want.

You could pay hundreds for the real deal, but the RipCord by iFLY simulator on Anthem of the Seas gives cruisers the chance to cross this one off the bucket list for no extra charge. After stepping inside the 23-foot tall glass flight chamber with your instructor, you’ll be jettisoned into the air at wind speeds up to 100 mph for one full minute, taking in views of open sea from the aft end of the ship. It’s a whole new meaning to free fall. Just note that on the line's China-based ships — Ovation of the Seas and Quantum of the Seas — there is a $29 fee.

Get ready for some major nostalgia on Oasis-class ships, where there’s a full-sized classic carousel on the Boardwalk that nods to seaside boardwalks of the past. You’ll find all ages hitching a ride on one of 18 figures, including everything from a zebra to a giraffe and even an ADA accessible chariot.

Once a first at sea, 30-foot rock climbing walls are now on every ship in Royal Caribbean’s fleet. Whether you’re a pro climber or a first-timer, there are different paths for all experience levels, from beginner to advanced. You can partake in speed climbing competitions, and even complimentary one-on-one sessions for beginners. The gear is also included — all you have to show up with are socks.

Even when cruising in the sunny Caribbean, you can grab a pair of figure or hockey skates and take to the ice, . All ages can hit the rink — whether to execute a perfect figure eight or just not fall over — on Oasis-, Freedom-, and Voyager-class ships.