I have heard tale of a legendary battle where there was enough dakka, but I don’t believe it.

Fun fact, the horizon on Earth is easily calculated as the square root of your height in meters, multiplied by 13.

Standing at the water’s edge of the Low Shore, you’ll never see the Horizon, it’s covered by clouds and rain… But it would be a hair less than 5km for the average sized adult human.

Standing on the edge of the Green Hell terrace and looking out, The Horizon is 161km out, which is not far enough to see the opposite shore line, but the Horizon is again blocked by clouds and rain, particularly the cloud wall at 100km out.

Standing on the edge of the Emerald Hills Terrace, the horizon is roughly 280km out, once again in the Low Sea.

From the Arid Steppe it’s 360km out, once again in that same region of the Low Sea.

From the Frozen Wastes, the Horizon is roughly 430km out, which puts it in the Low Sea.

And Finally, if you could stand on the Airless Wastes, the Horizon would be just over 500km out, nearly at the center of the Low Sea, but still just barely blocked by the Cloud Wall, just like every Terrace below.

That’s why I’m putting it together.

I’ll have more posts on the History, and Religions, and then move on to the various Sentient Races. Then I’ll start doing Kingdom Maps.

For a spoiler of each;

the History goes back to the earliest settlers coming out of the walls, no races are known to be native to the Canyonlands.

The gods of the Canyonlands are all Ascended Mortals. These gods often rule a territory or maybe even just a single city, within their domain, they are extremely powerful, but are no more knowledgeable about the world or its past than anyone else. There are powerful deities, known up and down the canyon, and none of them know more about the world than the average scholar.

As to Sentient Races, aside from Humans, and every flavor of Elf, Dwarf, Orc, etc., there are also Crab People who are in a constant war against the things that lurk below.

There are tiny communities of every race you want in your world, but humans outnumber everyone else several times over.

As a note here, 1000km is the distance between New York City and Indianapolis, or Paris and Vienna.

This means that the world holds as many as 40 Canyons. Some of these Canyons will be at different tech levels, and have slightly different magic density. The Structure, however, is identical between all Canyons.

Travel between different Canyons is normally impossible. The top of each Canyon is an airless, and magicless void. While caves into the walls are non-Euclidean. There are some notable Trade routes carved into the walls, tunnels that reliably connect different cities, but most of the tunnels will loop back into the same Canyon, albeit in a random location relative to the start.

It’s said that the caves have an infinite depth, and yet somewhere, somehow, they connect to anywhere. The trick is in finding the route.

Oddly, most of those who wander into a cave, come back out again in their Home Canyon, even if they somehow stumbled into another, The next time they enter the caves, they’ll likely end up home, or at least somewhere in their home Canyon. Children born within the walls have the even greater ability to reliably find their home within the caves, with no more than a week of randomly wandering the caves.

This is purely a storytelling mechanic to allow a GM to let players play in different sandboxes, while still bringing them home at the end of the day.