I sailed on Royal Caribbean's Icon of the Seas. These were my 8 favorite amenities on the world's largest cruise ship.

My eight favorite amenities on the new world's largest cruise ship are, for the most part, ones I've yet to see on other ships.Brittany Chang/Business Insider

• Royal Caribbean invited me to spend three complimentary nights on its new Icon of the Seas in January.
• My eight favorite amenities included the waterpark and jazz bar.

There's a reason Royal Caribbean's new mega-cruise ship is only operating seven-night sailings.

The 1,196-foot-long, 20-deck Icon of the Seas is packed with bars, restaurants, and things to do. Any shorter of an itinerary, and you might not have time to experience all it has to offer.

If you're a frequent cruiser — especially with Royal Caribbean — amenities like the mini-golf course and water playground may not seem exciting.

But of all the activities the new world's largest cruise ship has to offer, my eight favorites are, for the most part, ones I've yet to see on another vessel.

Take a look at what made the cut.