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Underground Caves

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Underground Caves
Name: Underground Caves
First Appearance: Sibling Arrivalries
Inhabitants: Vic Jr., Omega's forces
Status: Abandoned
"Wait a minute... afterlife? Underground cave!? What if this isn't Heaven! What if it's...noh, it couldn't be. Could it?"
"Oh, hey Sarge. What're you doin' down here?"
"It is! Oh, it is."
—Sarge in Spelunked

The Underground Caves are an area under Blood Gulch since the start of the series. The cavern holds a Blue base, Red base, and a computer, which shows everything in the canyon. It's suggested to be Vic Jr.'s base of operations.

Role in PlotEdit

Episode 88

When Donut was crushed by the arriving ship in The Arrival, he was pushed through the ground and landed in the Underground Caves. Sarge was soon buried after his funeral, even though he was still alive, but somehow fell through a hole in his grave and found Donut in these caves. After realizing that Sister was a Blue Team soldier and his own mistake, Simmons, along with Grif, entered the caves to rescue Sarge.

After reuniting the Red Team, Simmons finds Vic Jr. in the caves before the latter escaped, causing Simmons to realize that Vic Jr. has been manipulating both teams. During this time, Doc, Sister, and Junior enter the caves but are captured by Flowers/O'Malley and the Green Alien, who previously interrogated a drugged Grif with Andy. During Omega's final assault, the Red Team and Doc's group left the caves to provide aid in defeating Omega.


  • Sarge originally thought the caves were Heaven and then Hell due to the fact he thought he died.
  • Despite its major role in Season 5, an explanation is never given as to the nature of the caves, or the Blue and Red bases there.
  • In the Halo 2 engine, the Underground Caves are represented by "Waterworks".

External LinksEdit

Halo: CE Era: Blood GulchSidewinderCaboose's MindBattle CreekTeleporter Nexus
Halo 2 Era: Great Burning PlainsUNSC Wind Power FacilityGreat SwampGreat Freezing PlainsCitiesIsland FortressUnderground Caves
Halo 3 Era: Valhalla (Hologram Chamber)Rat's NestOutpost 48-ACommand (A.I. Containment Facility)

UNSC Maximum Security Detention FacilityAncient Alien TemplesFreelancer Offsite Storage Facility

Character Animation Era: A.I. Storage UnitAngel On My ShoulderMother of Invention (Training Room)Bjørndal Cryogenics Research FacilityInsurrection BuildingUNSC ArchivesUNSC Scrap Metal Recycling StationLongshore Shipyards
Halo 4 Era: Chorus (Crash Site BravoForest BaseDesert Refueling StationNew Republic Headquarters
Crash Site AlphaArmoniaRadio Jammer Station 1CCharon Research Complex 2CCharon Excavation Site
Jungle TempleEastern Mountain RangeCommunication TemplePurge)

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