Sunken City
A drowned paradise where ancient technology meets the deadly hunger of the deep.
The Sunken City of Orth is a breathtaking, submerged metropolis located within the Fourth Layer of the Great Abyss, renowned as one of the most beautiful and dangerous places in the world. Once a thriving civilization that defied the Curse through advanced technology and alchemy, it now lies beneath the surface of a vast underground sea, its towering architecture preserved in eerie silence. For Cave Raiders, Orth represents both a legendary treasure trove and a graveyard where many have lost their lives to the crushing pressure and the relentless hunger of the local fauna.
- Layer
- Fourth Layer
- Primary Feature
- Submerged ancient metropolis
- Key Hazard
- The Curse of the Abyss (Return)
- Dominant Flora
- Giant aquatic plants and bioluminescent fungi
- Notable Fauna
- Orca-like predators and massive cephalopods
- Historical Status
- Abandoned due to environmental collapse
Lore & Background
Today, Orth stands as a hauntingly beautiful ruin, its spires piercing the dark waters while schools of strange fish dart through broken windows. The city is filled with artifacts, machinery, and biological specimens that have fascinated explorers for centuries. Yet, the beauty masks a lethal reality; the water pressure is immense, and the creatures that now call this place home are far more aggressive than anything found in the upper layers. The Curse here is particularly vicious, turning any attempt to ascend into a nightmare of physical agony.
In Their Own Story
The beam of my headlamp cut through the murky green water, illuminating a statue of a weeping angel half-swallowed by coral. Silence pressed against my eardrums, heavier than the ocean above. I drifted past a grand archway, its stone etched with symbols that promised salvation but delivered only decay. Suddenly, a shadow detached itself from the darkness—a massive eye, unblinking and hungry, reflecting my trembling light before vanishing into the depths of the submerged plaza.
Reader's Guide
The Fourth Layer is defined by the vast underground sea, where the Sunken City of Orth lies at a significant depth requiring specialized diving equipment. The water here is cold and dark, illuminated only by bioluminescent flora that clings to the ruins. Hazards include extreme hydrostatic pressure, which can crush unprepared gear, and the aggressive fauna such as giant orcas and predatory cephalopods that hunt in packs. The environment is also filled with unstable currents and hidden debris from the collapsed city structures. The Curse of the Fourth Layer manifests upon leaving the water; climbers who ascend without protection suffer excruciating pain, nausea, and vomiting. This 'Return' effect intensifies with speed, making a slow, careful ascent mandatory to survive the transition back to drier layers.
Did You Know?
- The technology found in Orth suggests a civilization that mastered underwater life long before modern surface dwellers discovered the Abyss.
- Many artifacts recovered from the city are made of materials unknown to surface science, hinting at deep-earth resources.
- The water in the Fourth Layer is so dense and dark that visibility can drop to near zero without powerful artificial light sources.
- It is said that the city's original inhabitants tried to use their technology to reverse the Curse but ultimately failed.
More in The Abyss & Biomes
Elsewhere in the Made in Abyss universe
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