An atlas of
impossible places.
Discover realms defined by a single impossible truth.
Wander. Question. Enjoy.
Enter the Atlas →FEATURED WORLD
樓上城 The City Upstairs
Your childhood, still under construction
In Shimen, the top floor of every fifth apartment building opens onto the same city twenty years ago — which in Shimen means the boom: cranes to the horizon, mosaic tile and mirror glass, karaoke until four, and hoardings promising that this would be the richest city on earth. Nothing you do up there can change what happened. You can only shop in it, grieve in it, and come home.
Explore this world →THE ATLAS
逆行 The Withershins
Every seventh generation lives backwards
歉齡 The Apology Clock
You stop aging while you are owed an apology
休死日 Death's Holiday
One day a year, nothing can die
知期 The Appointed Day
Everyone knows the day they will die
褪字 The Fading Script
Ink lasts one year. Memory is a profession.
四十忘 The Amnesty
At forty, everyone forgets the last twenty years
傳藝 The Emptied Masters
To teach is to lose it — skills pass by touch
借思 The Assigned
Everyone hears one stranger thinking
真名 The Name Debt
Know my full name, and I owe you one favor a year
慢光 Slowlight
You can watch yesterday arriving down the street
見火 Witnessfire
Fire burns only while someone watches
逆雨 The Seventh Rain
Every seventh day, the rain falls up
浮世 The Raft World
Humanity chose the sea ten thousand years ago
寶船 The Treasure Fleets
The Pacific is a Chinese lake
蒸汽羅馬 Roma Aeterna
The empire industrialized — and never learned to stop
書城 The Unburned
Alexandria never burned. The librarians rule.
契膚 The Inked Covenant
Every contract is tattooed — the old are illuminated manuscripts
重力局 The Weight Authority
Gravity is a utility. The poor live heavy.
擇親 The Choosing
At seven, every child picks their parents
不夜城 The Undimmed Capital
The sun stands still by decree — and the provinces pay
萬聲 The Unfading
Every word ever spoken is still in the air
贈壽 The Given Years
Wages, dowries and charity, paid in life
潮國 The Tide Country
Two nations, one land, six months apart
直城 The Candid City
Inside the walls, no one can lie
回信 The Reply
The dead write back — one page, once a year
共夢市 The Commons of Sleep
Zoning law does not stop at midnight
長昏街 The Dusk Road
One street, forty thousand kilometers, no morning
忘川 Lethe
The rich are the ones who remember nothing
萬孔 The Ten Thousand Bores
Trade, marriage and war go through the wall
樓上城 The City Upstairs
Your childhood, still under construction
東歸蓮花傳 The Eastward Lotus
White fire beneath a dragon sky
No worlds match that search.
THE RULE
One hinge
Each world is allowed exactly one impossible fact — with hard, written limits.
Pure consequence
Laws, trades and customs all exist because of something. Nothing is decoration.
Ask it anything
Question any world's Lorekeeper — the answer stays in canon, or extends it by cause and effect.
STAY IN THE LOOP
New worlds, stories and updates from the Atlas.
QUESTIONS
What is 99 Worlds?
An atlas of ninety-nine invented worlds. Each turns on a single impossible fact, and everything else — its laws, its prices, its customs and its taboos — follows from that one fact by cause and effect. This is original fiction, not reference material.
Are these worlds published anywhere else?
No. They are written for this atlas and exist nowhere else. Every world, every law and every price you read here lives only here.
How should I explore it?
Start with today's world, or simply wander the Atlas. Each dossier reads straight through, but it also rewards dipping in — the laws and the price list will often tell you where you are faster than the opening paragraph does.
Can I ask a world questions?
Yes. Every world has a Lorekeeper who answers from inside it — how a trial works, what dinner costs, what happens to someone who breaks the rules. Where the dossier is silent, the answer is extended by cause and effect from what is written; it will never contradict the canon.
Why only one impossible fact per world?
Because that is what makes a world convincing. One divergence, rigorously followed, produces a place that holds up when an economist, a lawyer or a soldier starts asking questions. Ten divergences produce wallpaper.
Can I use a world in my own work?
Read it, quote it and take inspiration freely. If you want to use a world substantially in something you publish, write to us — the answer is usually yes, and we would like to know where it went.
Why two languages?
Every world is written twice, in English and in Traditional Chinese. The Chinese is not the English translated: proper nouns get Chinese names, proverbs get Chinese shapes, and the sentences are written to read as Chinese.
What does it cost?
Nothing. The whole atlas is free to read, supported by advertising. Asking a Lorekeeper carries a small daily allowance, which exists to bound compute costs and deter abuse. There is no paywall and no subscription.