The Unterzee
"Far calmer than any surface sea: black glass stretching to the fathomless depths of the Neath, glimmering with the light of false-stars. Beautiful in the way that only mirrors are, and deserts. Also positively stuffed with monsters and nine kinds of pirate."[1]
The Unterzee is a massive underground ocean in the Neath.
The Zee is a Harsh Mistress[edit | edit source]

"In the darkness of the Unterzee, everyone will hear you scream, but not everyone will see you."[2]
The Unterzee, teeming with life in its peligin waters, stretches across much of the Neath.[3] Its name was coined by a group of Dutch explorers who established relations with the Tomb-Colony of Venderbight in 1867. Their linguistic legacy lives on in Neath’s nautical vocabulary: "zailors," "zee-ztories," and "zubmarines" are common parlance,[4] though such excessive “Z” usage is often mocked as appropriative on the part of landlubbers.[5]
The Unterzee is dark, perilous and unforgiving.[6] It is dotted with stalagmites poking up from the zee floor, massive geodes, and the natural pillars of stone that hold up the Roof of the Neath,[7] all of which constitute hazards for an unprepared crew. For a brackish lake sealed within a cavern far beneath the Earth, it harbors a surprising abundance of life[8] - most of which is vast, hungry, and tooth-laden enough to swallow a ship whole.[9] The siren songs of the Drownies drift across the still waters, luring the unwary to a gasping death beneath the zee.[10] From the cavern Roof, massive boulders of glim occasionally plummet into the sea without warning.[11] Ill-prepared voyages often end in starvation, and worse.[12] And of course there are pirates, prowling the currents in search of vulnerable prey.[13]
Climate[edit | edit source]
The Unterzee does not have much weather to speak of. Winds are uncommon and usually mild (except when they aren't),[14] rendering sails useless in favor of steam engines and oars.[citation needed] Its waters are usually placid, though some regions have choppier waves.[15] When perfectly still, the surface of the Zee can act as a giant mirror, revealing glimpses of Parabola, the realm of dreams.[16]
Who Needs A Map?[edit | edit source]


"The Zee is treacherous; maps of the zee, doubly so. The motions of the false-stars disagree with your dead reckoning: you are not where you thought you were."[17]
Thanks to the Treachery of Maps, a peculiarity of the Neath, the Unterzee defies conventional cartography. Its islands tend to shift, and only a few landmarks stay fixed, making most charts unreliable.[18] Zailors deal with these alterations on the fly by relying on the false-stars, landmarks,[19] or simply their intuition.[20] Still, some regions remain relatively constant. London and its neighboring settlements are on the western shore of the Zee; the Elder Continent lies to the south; and the infinite East is the domain of Salt. (Don't go NORTH, if you value your life.)
The Unterzee is roughly shaped like a wheel, and its currents spiral counterclockwise; at the center of the wheel is a treacherous region called the Snares.[21][22] The currents of the Zee are said to carry captured emotions inward toward this region.[23] The pirate haven of Gaider's Mourn was built on an enormous stalagmite at the center of the Snares.[24]
London: the Fifth City. Deep, dark, and marvellous.
The Elder Continent is a vast, warm, and humid landmass, bathed in the soft glow of the Mountain of Light, that forms the southern edge of the Unterzee.
The Khanate is a powerful and technologically advanced nation inhabited by descendants of the Fourth City.
The Principles of Coral is a massive coral reef. Its primary port is Port Cecil.
Adam's Way is a port town at the mouth of the blood-red Nameless River. It marks the gateway to the Elder Continent and the Presbyterate.
Saviour's Rocks is an island chain filled to the brim with sorrow-spiders.
Venderbight is the most well-known port in the Tomb-Colonies. It is a frequent destination for traveling tomb-colonists and Londoners fleeing great scandal.
Hunter's Keep is a little island in the Southern Archipelago. It would be as desolate as its neighbors, if not for the solitary country house on its cliffs.
Mutton Island is a small island in the Southern Archipelago. Its primary settlement, Quaker's Haven, hosts the Fruits of the Zee Festival every August.
The Cumaean Canal is a true marvel of engineering that allows for easy passage between the Neath and the Surface.
The Iron Republic is a chaotic, lawless colony of Hell. And by "lawless," we mean that not even the laws of physics are applicable.
The Grand Geode is officially designated as Station V by the Admiralty. Something is not quite right here, however.
The Ragged Crow is an enormous lighthouse in the Stormbones. It serves as a key landmark for zailors that pass nearby, and it attracts dangerous, ship-sized Tyrant-Moths like literal moths to a flame.
Demeaux Island is covered in a fungal forest. Iron & Misery Company runs a dreary harvesting station here.
The Salt Lions are two enormous, ancient basalt monuments.
The Shepherd Isles are a small archipelago. Despite their name, there are no shepherds nor sheep here. And don't trust the locals.
Abbey Rock is a tiny island in the Southern Archipelago, and the home of an order of feisty warrior-nuns.
Station III is a top-secret Admiralty facility.
Port Carnelian, located on the coast of the Elder Continent, is London's first and only colony in the Neath.
The Avid Horizon is the frozen and desolate gate that links the Unterzee to the High Wilderness.
The Chapel of Lights is an... eccentric church that lights the way NORTH.
Gaider's Mourn is a pirate citadel, located at the center of the Snares and the Unterzee as a whole.
Godfall is a stalactite from the Roof of the Neath that crashed into the Unterzee. It is currently populated by a group of boisterous and warlike monks.
Polythreme, the birthplace of the Clay Men, is a small island nation ruled by the King with a Hundred Hearts.
The Isle of Cats is the foremost smuggling port in all the Zee, and the primary source of contraband gaoler's honey.
Mount Palmerston is a large volcanic island, covered in ash and burned ruins.
Khan's Glory is the place of residence for the upper caste of the Khanate.
Khan's Heart is the most populous city of the Khanate.
Khan's Shadow is inhabited by the Khanate's exiles, pirates, and other lost folk.
Pigmote Isle is uninhabited by humans. But it is inhabited - and its residents are positively adorable.
Frostfound is a castle of ice, and a repository of mind-bending secrets.
The Gant Pole is the place where zee-beasts go to die.
The Chelonate is an enormous zee-turtle carcass inhabited by a colony of Monster-Hunters.
The Empire of Hands is the homeland of the soul-loving Pentecost Apes.
The Uttershroom is a giant mushroom in the southern Unterzee.
The Fathomking's Hold is the magnificent coral castle of the Fathomking, most of which is invisible from the surface.
Aigul is a huge, stationary Lorn-Fluke. When a British zubmarine, the Fortas Kettle, was sunk by its spines, the Admiralty turned the whole mess into "Station VI."
Varchas is a sprawling city of light and mirrors, located near the coast of the Elder Continent.
Scrimshander is a giant underwater repository of knowledge, carved in ivory and bone.
Aestival is an island located under a hole in the Roof of the Neath. It is bathed in precious, deadly sunlight.
Kingeater's Castle is a castle at the end of the world.
Forces of Nature[edit | edit source]
"'Nearly there,' a zailor mutters. 'King Storm, stay your anger. Queen Stone, preserve our hearts. Salt, tempt us not - ' "'Belay that heathen prattling!" the bo'sun roars."[25]
Zailors are famously superstitious, and their beliefs in the Neath are typically associated with the three Gods of the Unterzee. None of these deities is entirely benevolent or malevolent, but zailors try not to provoke their ire.
- Stone, goddess of healing, hearth, and home. She resides in the Elder Continent as the Mountain of Light.
- Storm, god of violence, valor, and the crash of waves. It is said to reside in the Roof of the Neath.
- Salt, god of horizons, partings, and the restless urge to depart. Their domain lies in the Uttermost East.
Beyond gods, there are other entities that rule over the Zee:
- The Fathomking, sovereign of the Drownies, holds dominion over all who perish at zee.
- Lady Black, a solitary and lonely spirit, rules the depths of the zee and claims all who sink into its dark depths.
References[edit | edit source]
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