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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

Lost River Laboratory

1.23 km SW · 239° · 687 m deep-1112, -687, -696Show on map

Before you go

Doors

1× Alien door: place a tablet Orange 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

Fauna Reproductive DataTerminal

Things to scan

Alien Flora Specimen CaseDatabank entry

Alien Research EquipmentDatabank entry

3× Alien SensorDatabank 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)