Upper Caves

	Lower Underrail caves;
Major location information
Music	Subterra
Located in	Underrail
Areas	Lower Underrail caves
Connections	Lower Underrail (multiple exits); GMS compound level 1; Lost Vault; Hanging Rat bar; Bunker; Hephaestus Research
NPCs	Milton
Technical
Map file(s)	lux-a1, lux-a2, lux-a3, lux-a4, lux-a5, lux-a6, lux-a6x lux-a7, lux-a8, lux-a9, lux-a10, lux-a11, lux-a12 ; lux-b3, lux-b4, lux-b5, lux-b6, lux-b7, lux-b8, lux-b10, lux-b12, lux-b13, lux-b14, lux-b15, lux-b16, lux-b17, lux-b18, lux-b19 ; lux-c1, lux-c2, lux-c3, lux-c4, lux-c5, lux-c6, lux-c7

Lower Underrail caves are the caves directly connected to Lower Underrail, far above both Caves and Deep Caverns.

Description

Some wall breaches in Lower Underrail lead to these adjoining caverns. They are inhabited mostly by various wildlife and largely devoid of human life, except the occasional bandit camp here and there. Ruins of old military facilities can be found even in these caverns, despite them not being directly connected to Lower Underrail's systems.

Enemies

All sorts of critters reside in these caverns, and few humans can be occasionally met.

Critters: Rathounds, Rathound Alphas, Pigs, Warthogs, Azuridae, Dogs, Burrower Spawn, Burrowers, Crawlers

Lunatics: Lunatic Gunners (lvl10), Lunatic Scanners

Lurkers: Lurker Smugglers

Quests

Milton's Key

Map Gallery

Part 1

This part of Lower Underrail caves is initially accessible for the most part. They area near the South Gate area. Some passages must be opened with TNT Charges.

Lower Underrail caves A1, connects to south Lower Underrail
Lower Underrail caves A2
Lower Underrail caves A3
Lower Underrail caves A4
Lower Underrail caves A5
Lower Underrail caves A6, connects to GMS compound
Lower Underrail caves A6x, connects to Hephaestus Research
Lower Underrail caves A7, connects to northwest Lower Underrail
Lower Underrail caves A8
Lower Underrail caves A9
Lower Underrail caves A10
Lower Underrail caves A11, Milton's camp
Lower Underrail caves A12, connects to east Lower Underrail

Part 2

This part of Lower Underrail caves becomes accessible once the player has TNT Charges or Jackhammer. If entering from Lower Underrail, they are located north of Rail Crossing train station. If entering through other Lower Underrail caves, they are north of Milton's camp.

Lower Underrail caves B3 (north of Hephaestus Research)
Lower Underrail caves B4, crossroads
Lower Underrail caves B5, Smugglers
Lower Underrail caves B6
Lower Underrail caves B7, lake
Lower Underrail caves B8 (west of Lost Vault)
Lower Underrail caves B10, rathounds
Lower Underrail caves B12, Bunker entrance
Lower Underrail caves B13, pool, crawlers
Lower Underrail caves B14, pigs
Lower Underrail caves B15, rathounds
Lower Underrail caves B16, Ironhead camp
Lower Underrail caves B17, river
Lower Underrail caves B18, pigs
Lower Underrail caves B19, river
Lower Underrail caves B20
Lower Underrail caves

Part 3

This part of Lower Underrail caves is further north, approximately underneath Foundry's northern side and east of Core City.

Lower Underrail caves C1
Lower Underrail caves C2
Lower Underrail caves C3
Lower Underrail caves C4
Lower Underrail caves C5
Lower Underrail caves C6, lunatics and climbable route up (leads to outside of Hecate Research Outpost)
Lower Underrail caves C7