A Nether-only world, Superia was created to give everyone access to the newer biomes that wouldn't be accessible on Laurasia. Superia is a smaller circular world with a diameter of 4000 blocks. Builds are very much welcome!
Superia was first created for 1.16 - the Nether Update. Due to a bug in the initial release, very few natural structures are found within.
The world border was changed from a circle to a square in 1.19. These new corners are more likely to contain structures.
Bed explosions are disabled as this world is more recommended for building. If you're only looking for raw materials, Rodinia's Nether's outer edge might be for you.
Styx
Acheron
Cocytus
Phlegethon
Lethe