Every human alive visits the Dreamlands every night. Almost none of them remember. The file exists because of the exceptions.

The Dreamlands are a parallel territory — not a metaphor, not a psychological construct, not a shared hallucination. A real place with consistent geography, persistent inhabitants, its own moon, its own gods, and its own dead. The mechanism of access is sleep. The mechanism of forgetting is the waking mind, which discards what it cannot file. The territory does not change because the visitors fail to recall it. It carries on in their absence with the indifference of any landscape.

What follows is the most reliable composite that can be assembled from competent dreamers, journals recovered from the bedrooms of the missing, and the testimony of Randolph Carter before his disappearance.

The Geography

The Dreamlands have known regions, named regions, mapped regions — though no map agrees with another, because the territory rearranges itself around the cartographer.

The Enchanted Wood is the entry point for most experienced dreamers. From there the territory opens westward to the river Skai and the six cities of the plain — Hatheg, Nir, Ulthar (where the cats are sovereign), and three others whose names appear in fragments. North lies the cold waste and, beyond it, Unknown Kadath. South lies the harbor towns and the sea routes to Celephaïs and the basalt pillars of the West. Below — accessed through the seventy steps of deeper slumber and the seven hundred steps of the Gate of Deeper Slumber — lies the underworld, which is older than the surface and inhabited by things that were here before the dreamers.

Lake Hali is mapped in the journals but its location shifts. The Plateau of Leng exists in both the Dreamlands and the waking world, which is one of the Dreamlands' more troubling features. The boundary between dream and waking is not where the unprepared assume it is.

The Rules

Conceptual laws, not physical ones. Intent shapes terrain. Memory anchors location. A dreamer who knows where they are going arrives. A dreamer who hesitates ends up somewhere else. The Dreamlands reward conviction and punish ambivalence with the precision of a system that has been refining its responses for several million years.

Time flows differently. Months in the Dreamlands can equate to a single waking night, or a single waking night to years of dream-time. The ratio is not fixed and cannot be predicted in advance. Dreamers who attempt long expeditions must accept that the body they left behind may have aged, starved, or been moved before their return.

The standard entry mechanism is the descent — a dreamer of sufficient training reaches the seventy steps of light slumber, then the seven hundred steps of deeper slumber, then steps through the Gate. The The Silver Key permits something different and more dangerous: a physical crossing, body and all, without the mediation of sleep. Few keys exist. Fewer dreamers know how to use one.

The Visitors

Three categories. The nightly tourist — every sleeping human, drifting through the shallows of the borderlands and remembering nothing. The trained dreamer — capable of intent, navigation, and recall, returning each morning with usable intelligence. And the crosser — the rare practitioner who goes bodily, or who goes deep enough that the return path becomes optional.

The third category is the one the file is concerned with. The Dreamlands keep visitors who forget the way home. Some of them become permanent residents. Some of them rule cities. King Kuranes of Celephaïs starved to death in a London gutter in the 1890s and has not been absent from his throne for a single night since. The Dreamlands do not require respiration to retain a citizen.

Threat Profile

Not actively hostile. The territory has no agenda toward the waking world, and most of its inhabitants — the cats of Ulthar, the merchants of the river towns, the zoogs in the wood — are indifferent or benign. The threat is structural.

Time dilation can strand a body. Deep regions border the Mythos proper — Leng, the underworld, the cold waste — and entities native to those regions notice deliberate visitors. T̊Y̨̒̏Q̀B͕͒I̴Ḟ̚𓆈H̵͋̅H͓̓W̋ maintains a presence in the deeper Dreamlands that no competent dreamer should approach voluntarily. And the gate works in both directions: things that originate in dream can occasionally use a dreamer as a vehicle back to the waking world. The night-gaunts, the moon-beasts, and worse have been documented on this side of the threshold.

The Dreamlands are not dangerous the way an active cult is dangerous. They are dangerous the way the open ocean is dangerous — vast, indifferent, full of things that were doing fine before you arrived and will continue doing fine after you do not come back.