https://www.gamespot.com/articles/a-look-at-every-kingdom-in-super-mario-odyssey/1100-6454444/

Super Mario Odyssey is technically an open-world game, but it's actually split into over a dozen open environments--17, to be exact. These range from the festive Sand Kingdom, which offers a mix of Mexican and Egyptian imagery, to the blocky and alluringly neon Luncheon Kingdom. You guessed it: it's themed around food. Every location has character of its own and a surprising number of puzzles, platforming challenges, and hidden secrets within.