Underground

The Underground biome

### Size

Makes up the entirety of the planet from below the surface to the roof of the Underworld

### Subs-Areas

* The underground Desert
* The Sunken Sea
* The underground Tundra
* The underground Jungle
* Underground Mushroom Colonies
* The Abyss

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The **Underground** region makes up the entire stone layer of the planet. It is what supplies the planet's residents with stone, ore, gems, and various other minerals. Over the course of the planet's lifetime, large amounts of the Underground have been hollowed out to form cave tunnels. It is the domain watched over by the Earth Elemental.

## Lore

During the formation of the planet long ago, the Underground layer can be considered the second distinguishable biome to appear within it, after the Underworld. During the planet's early years, nothing of much importance happened within the cavern layer of the world, save for it supplying early humans with the stone and ore they required to forge stronger tools, and housing various critters such as snails and mice.

However, those who worshiped the Earth Elemental would be naturally drawn to her natural realm, and began relocating the the Underground layer to be closer to their goddess. Those who would receive her blessing would become Dwarves, and wish to live underground permanently. Over time, due to the abundance of metal surrounding them, Dwarfs would become adept at crafting tools and weapons, and would often trade them with surface-residents for other supplies. The abundance of weapons possessed by the race would slowly lead to their current violent nature, which would inevitably be their downfall.

As more clans of dwarfs acquired access to weaponry, they would declare wars on each other to determine which clan was strongest, and with the introduction of explosives, led to many deaths worldwide. For a while, they couldn't help themselves from killing one another, as minimal punishment against murder was present at the time. These battles would inevitably cause damage to the underground caverns in which they resided, causing ceilings to fall or tunnels to collapse, but no real harm could come to the biome itself.

As the dwarf body count quickly escalated, the region would soon become less and less populated, until it was practically empty once again, save for the various critters and monsters which roamed the place. To this day, various terrarian miners have been uncovering more ore unclaimed by the subterranean population, one such group being the Final Stand.

## Population

* Dwarves
* Some humans
* Snails
* Mice
* Some slimes
* Bats

## Sub-Areas

### The Underground Desert

The region where the Underground intersects with the Desert. The underground Desert is home to the various species of Antlion, as well as the legendary Desert Scourge. Unlike the central Underground, few dwarfs occupied the area, but rather, several tribes of lamiae seeking refuge from the terrors above.

The underground Desert contains several fossils buried within, possibly belonging to those slain during the destruction of the Sea Kingdom, and is often roamed by Ghouls, bodies of dead explorers reanimated by the desert sands.

### The Sunken Sea

The eutrophic remains of the Ocean Kingdom, buried beneath layers of sand and fossil. Though its original population has long since passed away, new life has been able to adapt, turning a smoldering city into an isolated haven.

### The Underground Tundra

The caverns beneath the cold regions of the world, composed almost entirely of ice and slush. Despite their temperature dipping far below zero, several desperate humans have taken refuge in these caves, constructing small boreal houses. Those that dared venture here, however, would never last long, and few have ever returned.

### The Underground Jungle

Considered to be the wildest part of the world, the underground Jungle houses some of the most profound creatures to roam the land, and some of the most deadly. Guarded by hornets, man eaters, and other vicious predators, explorers have never lasted long in the jungle caves.

### The Underground Mushroom Colonies

Colonies of the Glowing Parasite, appearing sporadically throughout the world. It is believed that multiple caves exist through the process of a host carrying the parasite from one location to another, eventually collapsing into a pile of fungal flesh as the parasite is allowing to claim another part of the world.

### The Abyss

A massive crevice located underneath the Sulfuric Sea. It is known to be the deepest body of water on the planet, and houses many species of aquatic life, including those that can rival the power of the gods themselves.

## Trivia

* The Underground is the largest location on Terraria.

## Gallery

Underground background 1 (Pre-1.2)Underground background 2Underground background 3Underground background 4Underground background 5Underground background 6Underground background 7Underground background 8Underground background 9Underground biome bannerCavern Background 1 (Pre-1.2)Cavern Background 2Cavern Background 3Cavern Background 4Cavern Background 5Cavern Background 6Cavern Background 7Cavern Background 8Cavern Background 9Lava Layer Background 1Lava Layer Background 2Lava Layer Background 3Lava Layer Background 4Cavern biome banner