Gone are the days when shuffleboard and marathon bingo games were the most exciting things to do on a cruise ship.

Now water parks and, in some cases, entire theme parks are coming along for the ride. The experiences range from the serenely tranquil to the intensely terrifying. The most outrageous cruise ship attractions appeal to an expanding demographic of loyalists and first-time cruisers looking for a little adventure.

Though many lines are pushing the envelope when it comes to extreme attractions, Royal Caribbean is really testing the limits of what’s possible onboard a high-seas vessel-- but that hasn’t stopped others like Viking Ocean Cruises and Princess Cruises from presenting honorable mentions.

Looking to set sail with some serious thrills? Check out a few of our favorite adventurous attractions.