The cruise industry has been growing fast in recent years - and so has the size of its ships. It wasn't until the 1996 debut of the 101, 353-ton Carnival Destiny that a cruise vessel exceeded 100, 000 tons. Now the biggest ships are more than twice that size, with two in the top 10 having been built just this past year.
Our new photo tour in the carousel above offers a ship-by-ship look at the new Kings of the High Seas, starting with the 50th largest and counting down to No. 1. It's a list that won't remain static for long. More giant cruise vessels are on the way, including Royal Caribbean's soon-to-debut Harmony of the Seas, which at 227, 000 tons will be the largest cruise ship ever built.
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PHOTO TOUR: Inside Royal Caribbean's newest megaship
As for the once mighty Carnival Destiny, now renamed Carnival Sunshine: Even after an expansion in 2013 that boosted its size to 102, 853 tons, it doesn't even make the list of biggest megaships. In today's cruise world, it's almost midsize.
What do the latest crop of massive mega-ships look like on the inside? See for yourself with a scroll through our deck-by-deck tours below of giant new vessels from industry leaders Carnival, Royal Caribbean and Princess.