Check out this ship!
Well to be more accurate, this is a cruise ship. If you have a big space to fill we can recommend you to make this huge build as in theory a cruise ship takes a lot of space.
You can take some ideas from this ship but you can also google some old known cruises like the Queen Elizabeth 2 or other one which had a movie about it’s sinking and a wooden door which could’ve saved two people, I believe it’s called Titanic.
If you like to spend some time building the cruise ship interior remember that now days they have some amazing facilities inside for their customers that can be a whole city inside one ship. You can add areas like dinning, shops, bars, nightclubs, casinos, pools, cinema, karaoke, etc. Tons of stuff you can do inside of one of this beauties.