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This landmark is late-game content: a deep biome, a leviathan or part of the story. It stays hidden until you choose to see it.

Alien siteLost River

Alien Disease Research Facility

400 m NW · 328° · 811 m deep-264, -811, 281Show on map

Before you go

Doors

1× Alien door: place a tablet Purple tablet

Reach it with

Seamoth + Seamoth depth module MK3
Prawn suit
Cyclops + Cyclops depth module MK1

Crush depths from the game's vehicle data. Depth guide

PDAs and terminals

Damage reportTerminal
Specimen Research DataTerminal

Things to scan

6× Damaged CableDatabank entry

WarperDatabank entry

Ray SpecimensDatabank entry

Alien ArchDatabank entry

Bearing and distance are measured from the centre of the area where your lifepod lands (it lands at a random spot up to 400 m away). Bearings follow the in-game compass.

Subnautica data: build 83031 (Oct 2025)