A region of waterfalls, rivers, lots of ancient oaks and an Ocean (or at least what would be an Ocean if The Seam wasn't in place).
Major Industries:
Fishing -- along the Ocean and some smaller islands. Fish and seafood are a major protein source, particularly since saltmining operations mean they can be preserved on-site.
Logging -- Ancient Oaks are cut down and their roots are emboldened by Emeralds for eventual regrowth (though it definitely takes a while).
Sawmills -- waterfall-powered sawmills cut ancient oak logs into usable forms.
Wood Industry -- along the coasts, there are sizable wood industries that take in cut logs floated downstream and turn them into more useful forms. There's a much bigger supply here than in the Valley of the Grove -- trees there are smaller and less useful for wood than whatever products they're producing.
Smaller industries:
Sapphire charging -- sapphires hold large amounts of water and are easy to move around. They're useful in Cloudseeding operations in the Skylands, intensive agriculture in the Valley of the Grove, and *very* useful in the Bone Desert since it has zero rainfall.
Saltmining -- Salt is pulled from the ocean. Salt has culinary/food preservation applications. It also has a variety of smaller roles like its use in agriculture or potionmaking.
Mushroom Farming -- Mushrooms grow natively near the Ancient Oaks. They're an important food source of Bats and Worms, have some general culinary use and construction potential as well.
Kyanite Charging -- Kyanite stores Wind energy that comes from the Sea. It's useful in Cloudseeding and has some use in construction as well, particularly demolition. It's helpful to guard areas against Sandstorms in the Bone Desert as well.
The Delvelands are a mountainous region in the True Center of the world. It's also the only region of the world that still has a normal day/night cycle, shifted more in the lunar direction. Lunar energy is required for Jewels to have magical properties.
Deep within the Delvelands, down ancient abandoned passageways and behind magically sealed doors exists the City of the Lunar Priests. This is where you begin the game.
Major industries:
Ore mining -- Metals are highly useful and fairly common.
Jewel mining -- Jewels are a lot rarer but some known veins exist. Jewels are highly useful for magical applications -- basically anything that doesn't require a charged Sunstone comes from here.
Metalworking -- Volcanic regions are highly useful for processing ores info usable metals.
Forging -- usable metals are turned into useful forms.
Lesser industries:
Jewelcraft -- Jewels have secondary magical effects when combined together or coupled with precious metals. This industry formats them into useful jewelry.
Masonry -- Lots of stone is continuously moved out of the Delvelands as mines expand. This industry does something useful with it. Stone is a useful building material elsewhere.
Claymining -- Clay accumulates in watery regions of the Delvelands. Clay is useful in cheap pottery and as a means of metalworking. Higher qualities are also useful aesthetically.
Batfarms -- bats are domesticated and are useful in exploring the passageways down here as well as scouting wild areas in the Valley of the Grove and natural caves in Bonemines.
Wormfarms -- worms are also native here. They're an important protein source for many domesticated animals and are highly useful in the Fishing industry as a source of bait.
The Valley of the Grove is a lush region that specializes in all kinds of agriculture and plant products more generally. It exists in a kind of caldera formed by the Delvelands on one side and ocean-facing cliffs on the other. There are four subregions:
Highcliffs -- the other side of the caldera. Useful for farming Coconut, Palm, Mango and other tropical crops.
Valley Jungle -- a thick jungle where potion ingredients are sourced from the local flora and fauna. Quite dangerous to traverse, but some areas are cut around and demarcated for easier gathering (assuming those plants and animals can't be domesticated for whatever reason).
Plains -- higher regions closer to the Delvelands and/or ancient areas of Jungle that have been deforested have rolling fields of grass that are occupied by large-scale farming and/or animal farming operations.
Groveheart -- at the exact center of the caldera a big rocky outcropping juts out and trees are grown at the top, taking advantage of this being the center of the Woodwinds.
Major industries:
Potionsourcing -- potion ingredients are pulled out of the jungle. Particularly potent ones might be found in wilder regions. The Woodwinds alter things quite a lot over time.
Potionmaking -- It makes a lot of sense for Potions to be brewed up here too, which happens very close to the source.
Plant farming -- scattered all over, but roughly follows the subregions labelled above.
Animal farming -- not really viable outside of the Plains or otherwise unused areas of the Highcliffs. Animals are farmed everywhere in the world but the animal farms here have a stranglehold on the industry, making sure that the live ones they ship out are infertile (generally via Potions, which are in ready supply).
Culinary -- Plants and animals are major sources of food, so this industry processes them into various forms which are then shipped out. They tend to require a pretty heavy import of salt from Tidefall.
Smaller industries:
Emerald Charging -- Emeralds concentrate Wood energy, which is highly useful for agriculture elsewhere. Loggers, Mushroom Farmers and the Cactdye industry uses these a lot, as does agriculture here more generally for much faster production.
Leatherworking -- domesticated cows provide a source of leather, which has various uses.
Clothworking -- Sheep provide wool, which is woven into Cloth. This is useful for Sails in boating-type areas over in Tidefall. Also useful for clothing more generally.
The Skylands is a large floating island that sits over The Seam. It's perpetually Day here, while other areas might have at least twilight or occasionally some night (only the Delvelands has a normal cycle), it's perpetually sunny here.
The Seam is a magical portal that brings together the farthest reaches of the ocean around The Valley of the Grove and Tidefall and the Sandwall of Bone Desert, making the world a whole lot smaller and giving it a second center that the Skylands can sit above.
The Skylands is the central power of the world. In its exact center at the highest point is the Temple of the Sun, the HQ of the Solar Priests and the center of their political authority. And also a city in its own right.
Major industries here include:
Sunstone Charging -- It's perpetually daytime, so Mirror Towers are all around the Skylands to charge Sunstones with solar energy, which is useful as a general energy source, as well as reanimating skeletons and has other magical uses.
Whalefishing -- Skywhales swim across the sky. They're an important source of Oil (used for lighting, particularly in the Delvelands and culinary use) but are also a source of Levitonium -- mining the island isn't wise as it'll make it fall. Levitonium allows people to essentially fly up here and interact with clouds and continue to whalefish. Levitonium is highly useful in architecture more generally and also helps a lot with transporting out large shipments of rock or whatever. It loses its potency when taken out of the Skylands and becomes inert rock so it has to be replenished.
Cloudseeding -- The Skylands practices intensive weather modification by seeding clouds with Sapphire and Kyanite, making sure that the Bone Desert stays dry, there's a constant stream of water in Tidefall, and the Valley of the Grove gets most of the water supply. This is definitely under the domain of the Solar Priests but they subcontract a lot of the actual work out.
Lesser industries:
Icefarming -- at higher levels of the Skylands it gets quite cold, and water turns to ice. Ice is farmed and transported elsewhere to serve as cooling -- particularly useful in agriculture and metalworking.
Frostberry Farming -- in icy regions of the Skylands, Frostberries can be grown. They have useful effects in Potionmaking, but their main use is in increasing Longevity, both with domesticated animals that put out useful products over time like eggs or milk and as a source of maintaining human immortality.
The Skybrary -- given its importance as the administrative center of the world, the Skylands is also where the compendium of human knowledge is stored, in giant accessible tomes of Jade.
Fine Arts -- given its political wealth and hegemony, there's a big industry for fine arts. Things like glassware, high quality pottery, paintings, etc.
