ThePrinceofMillAve
The Dark Heart of My Little Pwny
If you play Minecraft and enjoy the game portions, you might be interested in world generators. The game itself has procedurally generated landscapes, that means they're made using a bit of mathematical code--this is why when someone uses the same seed as you do they can find the same things/pl;aces as you do in your Minecraft world.
The above world generator is "Biospheres" which creates floating masses, hemispheres of rock covered by glass hemispheres with biomes inside, all connected by wooden bridges.
Take a look. The mod is actually quite fun to play in and check out what it can create.