A pale limestone arch standing alone on a rust-orange desert plain, a low sun burning through its opening.

The same arch on a grey lunar ash plain under hard white light, its shadow thrown far across the dust.

The arch on a frozen black beach beneath a green aurora, mirrored in sheets of meltwater.

The arch swallowed by emerald jungle, god-rays falling through canopy mist into its opening.

The arch on an endless white salt lake at dusk, perfectly reflected under a lavender sky.

The arch on a black basalt cliff above a violent ocean, a storm wall and lightning behind it.

Six worlds.One door.

The gate has stood in six places at once since before anyone thought to measure it. Scroll, and the stone will not move.

01 Kharis Basin

KharisBasin

14°22′S · 87°09′E — RUST QUARTER

The sun sets here for nine hours and never quite finishes the sentence.

Open the gate

02 Ashfall Plain

AshfallPlain

03°41′N · 21°55′W — GREY QUARTER

Nothing has moved this dust in four billion years. You will.

Open the gate

03 Lantern Veld

LanternVeld

68°17′N · 15°02′W — COLD QUARTER

The sky rehearses a colour your eye has no word for, nightly, without an audience.

Open the gate

04 Green Cathedral

GreenCathedral

02°08′S · 113°44′E — WET QUARTER

The forest agreed to grow around the gate. Not over it. Nobody knows what was offered.

Open the gate

05 Mirror Salar

MirrorSalar

20°26′S · 67°33′W — PALE QUARTER

Walk far enough across it and you will meet yourself walking back.

Open the gate

06 Black Roadstead

BlackRoadstead

56°49′S · 03°12′W — LAST QUARTER

The final gate. It only ever opens outward, and it has never once been closed.

Open the gate

Scroll · or use ← → and keys 1–6

02 — Expedition index

Six standing
invitations.

Each gate is the same gate. We have only ever built one. What differs is the country it decides to stand in on the morning you arrive — and how long it agrees to stay there.

01
Kharis Basin
14°22′S · 87°09′E Rust quarter
02
Ashfall Plain
03°41′N · 21°55′W Grey quarter
03
Lantern Veld
68°17′N · 15°02′W Cold quarter
04
Green Cathedral
02°08′S · 113°44′E Wet quarter
05
Mirror Salar
20°26′S · 67°33′W Pale quarter
06
Black Roadstead
56°49′S · 03°12′W Last quarter

03 — Conditions on the far side

What waits
past the stone.

Readings are taken from the threshold plane itself, one pace beyond the keystone, at local dawn. They hold for the duration of the transit window and not one hour longer. Dress accordingly.

Kharis Basin

Gravity: g
Mean temp: °C
Atmosphere: kPa
Transit window: days

Thin carbon dioxide. Dust storms are seasonal and total. Bring your own weather.

Ashfall Plain

Gravity: g
Mean temp: °C
Atmosphere: kPa
Transit window: days

No air, no wind, no erosion. Your footprints are the permanent record.

Lantern Veld

Gravity: g
Mean temp: °C
Atmosphere: kPa
Transit window: days

Breathable and bitter. The light overhead is charged; instruments will lie to you.

Green Cathedral

Gravity: g
Mean temp: °C
Atmosphere: kPa
Transit window: days

Heavy, wet, and loud. The canopy keeps the gate in shade for all but forty minutes a day.

Mirror Salar

Gravity: g
Mean temp: °C
Atmosphere: kPa
Transit window: days

Two centimetres of standing brine. No horizon to speak of. Eye protection is mandatory.

Black Roadstead

Gravity: g
Mean temp: °C
Atmosphere: kPa
Transit window: days

Twelve days, then the sea takes the causeway back. We do not extend this one.

The arch on the salt flat at dusk, seen through the closing gate.

04 — The gate closes at dusk, local

You do notpass through it.It passesthrough you.

Choose a world