The world's largest cruise ship is the Harmony of the Seas. Izz has a couple of details about it .: Length: 362 meters Height: 16 floors Weight: 120 thousand tons Preparation time: 10 million working hours Production cost: HUF 315 billion Here is a video about making it. This shows the construction of the ship at an accelerated pace. I think it's very interesting. :) https://www.youtube.com/watch?v=Pk_JIHel7To