The Underground Jungle is one of the most difficult areas in the world of Terraria(Pre-Hardmode). It is a dense network of small caverns, populated with thorns, water, and some of the more difficult enemies. You can safely but slowly make your way through if you have the Vilethorn, since you can wall yourself in at the first sign of Hornets and then kill them through the walls.
Shrines are common in this environment, often containing chests with rare items or weapons that can't be found anywhere else. Materials such as Stingers, Jungle Spores, and Vines (for use in crafting rare items) can also be gathered here in abundance. This biome will most likely end up taking you to The Underworld without much additional digging.
|Enemies||Unique treasures||Unique drops|
 Hunting the Jungle
|Map Size||Min Start Depth||Average Start Depth||Max Start Depth|
|Small||60 ft||240 ft||420 ft|
|Medium||90 ft||360 ft||630 ft|
|Large||120 ft||480 ft||840 ft|
It is suggested that you should gather all the materials you could want from the Underground Jungle before activating Hardmode; the uncontrollable spread of the Underground Corruption will most likely destroy all jungle areas, unless proper Hallow precautions are taken.
While underground mud by itself is somewhat resistant to corruption spread, corruption still can spread through underground jungles by converting jungle grass into corrupted grass. So, to save underground jungles from full conversion, you need to ensure that there are no jungle grass blocks within three squares radius of any corrupted or corruptible blocks.
- More Gems spawn in the Underground Jungle.
- Thorny Bushes growing from Jungle Grass are now destroyed on contact with the player.
- Underground Jungle now has Mud Background to avoid spawning Underground/Cavern layer mobs.
- 1.0.5: Unique music track added.
- Jungle plants now grow underwater.
- Now found directly under the Surface Jungle biome.
- Pre-Release: Introduced.
|Forests • Desert • Ocean • Jungle • Snow • The Corruption • The Hallow|
Underground • Cavern • Underground Jungle • Underground Corruption • Underground Hallow
Dungeon • Meteorite • Floating Island • The Underworld