When I visit big cities I like to take pictures of buildings. Repeating patterns are like puzzles for our brains because we automatically look for slight differences. Maybe that's related to an evolutionary survival trait like looking for predators in the tall grasses of the African savanna. However this is neither Africa nor a big city. This is an urban scene at sea, aka a cruise ship docked in the Bahamas.
This is Royal Caribbean's Harmony of the Seas. If I'm not mistaken it's the largest cruise ship in the world right now.
I was on a small ferry traversing the port as we passed this behemoth docked at the terminal. It is about twenty stories high and as long as an air strip. This is just one small section of one side. These mega ships are more akin to cities than boats.
This last weekend I was on cruise ship several times smaller than this, and even that was still quite big. Big enough to have several pools, a rock climbing wall, a casino, clubs, bars and restaurants. So take all that and multiply it by three or four.
A few years back I was on the Aurora of the Seas, which at the time was the world's largest. To be honest, it took me a week to figure out where everything was. It's a little like visiting Disney World, it takes a while to get your bearings. Since that time we've cruised on much smaller ships, like the one this last weekend. And even then there were places on the ship I never saw.
If they make these ships any bigger they might just become indistinguishable from big cities.