Video: If you take the Empire State building, flipped it over to the side, and then put it in the ocean, it would be smaller than some of the world’s largest ships. That’s how big these behemoths of the sea are, more gigantic than skyscrapers. Oil tankers, container ships, pipe-laying vessels, yachts, sailing boats, cruise ships and more, we’ve got all the world’s largest ships still in service today. At times, the scale is just unfathomable.