Horizon Zero Dawn Codexery

The Sunken City

Beneath the waves lies the ghost of a civilization that once ruled the earth.

The Sunken City is the colloquial designation given by scholars and nomads to the submerged ruins of Old World Seattle. Located along the Pacific Northwest coastline, these underwater remnants stand as a testament to the catastrophic climate shifts that followed the nuclear apocalypse known as the Fall. While not marked on modern maps as a single zone, the area encompasses deep-sea facilities and ruined skyscrapers that now lie beneath rising ocean levels.

Location
Pacific Northwest Coast
Original Identity
Old World Seattle
Current State
Submerged Ruins
Era
Pre-Fall / Post-Fall
Access Requirement
Diving Gear or Underwater Facility
Significance
Zero Dawn Archives and Historical Data

Lore & Background

These ruins are not merely graves of the past but active repositories of history. Explorers who venture into the deep often find that the water pressure has preserved digital records better than any surface archive. The structures themselves, now overgrown with coral and kelp, serve as a stark reminder of humanity's hubris before the machines rose to reclaim the world.

In Their Own Story

The beam of Aloy's flashlight cut through the murky green darkness, illuminating the rusted face of a skyscraper that had once pierced the clouds. Bubbles escaped her rebreather in rhythmic puffs as she hovered near an ancient data terminal embedded in the seabed. It was silent here, save for the distant groan of shifting metal and the click of scavenging fish against glass. She touched the cold interface, feeling the weight of a thousand years pressing down on her shoulders.

Reader's Guide

The Sunken City represents one of the most haunting remnants of the Old World, specifically referring to the submerged ruins of Seattle. Located along the Pacific Northwest coastline, this area is accessible only through specialized diving equipment found in certain underwater facilities. In the narrative, it serves as a crucial historical archive, preserving data about the Zero Dawn project and the origins of the Faro Plague that nearly extinguished humanity. Explorers can find ancient structures half-buried under silt, their steel skeletons now home to aquatic life and occasionally patrolled by submerged machine variants. The site matters because it provides tangible proof of how drastically the climate changed following the nuclear exchange known as the Fall. For Aloy, visiting these depths is more than exploration; it is a pilgrimage to understand why her ancestors failed. Finding data shards here often unlocks key storylines regarding the AI systems that saved civilization. Though dangerous due to pressure and hostile fauna, the secrets hidden beneath the waves are essential for understanding the true scope of the apocalypse.

Did You Know?

More in World & Locations

Elsewhere in the Horizon Zero Dawn universe

Open in the interactive codex →