Freedom of the Seas, the largest cruise ship ever built. Recently launched and ready for her maiden voyage with over 4,300 passengers. All 18 decks of her.
At 158,000 tonne, she is without doubt one of the largest vessels on the seven seas.
I'm not sure how I feel about this thing. Engineering wonder. Marvel of mechanical achievement. Marketing masterpiece. Abomination.
Personally, I'd rather sail on a 12 passenger freighter than a floating city. But hey, that's me. My Dad would have loved this thing.