So retrying out a campaign setting building exercise I read a long time ago and wanted to see what you all think of it (or come up with using it).
The premise is this: Imagine a planet in the shape of a d20 die, each of the triangular sides on it is a blank slate for you to build whatever country/continent/island chain/culture/etc you want. Once you have finished detailing one triangle you move on to the next one until all 20 sides of the d20 have been fleshed out. Get as creative as you want with these triangles as it's up to you if whatever is on say the #1 triangle will interact with the #18 triangle. You can also have others make their own stuff on the other triangles for a group made world.
Each triangle measures let's say 5,000 miles from center point to each corner (lost my notes on how many actual miles each triangle would be if this was based off of Earth so just making up a number right now).
Again be as creative as you want, put whatever races, cultures, technology, classes, and such in each triangle.
#1 Triangle: The triangle of rabbits. There are only rabbits here, somehow magically sustained without food on a vast flat continent.
#2-20 Triangles: Water.