When the first water slide slid onto the cruise deck scene nearly 50 years ago, it certainly wowed guests young and old. Soon water slides were added to cruise lines' private island water parks.

Once no more than simple poolside slides, cruise ship water attractions have undergone a change into some of the fastest-evolving spaces on sea. What began with modest additions, like Carnival's early ...

Amusement parks used to be land-based only. Increasingly, though, adrenalin junkies can get their kicks at sea. Cruise lines are installing a variety of roller coasters and other rides on the top ...