The Overworld

The Overworld is a dimension where The Player spawns at. This is the largest dimension in Minecraft.

Landscape
The Overworld has a few biomes: The Overworld contains structures such as End Fortresses, Villages, Desert Temples, Jungle Temples, and random Wells.
 * Desert
 * Plains
 * Acacia Forest
 * Dark Oak Forest
 * Swamp
 * Jungle
 * Mesa

The Overworld even has Caves, where hostile mobs inhabit the place. This is due to the fact it's dark down there. Hostile Mobs can even spawn on the surface at night depending on the game difficulty.

Mobs
These are the list of mobs that inhabit The Overworld:
 * Pig
 * Ocelot
 * Wolf
 * Cow
 * Chicken
 * Villager
 * Iron Golem
 * Witch
 * Zombie
 * Enderman
 * Spider
 * Cave Spider
 * Skeleton
 * Creeper