Wastelands and hostile regions, Hero-Cities RPG

Location: The Central Inland Sea, but the name is usually only used to refer to the deepest parts.
Terrain: Deep sea water
Intelligent Inhabitants: Some water outsiders, merfolk, sea dragons
Creatures: Sea monsters of all forms and varieties.
Other Threats:
Useful commodities: Direct route for travel

Location: West of Hikitami Island, east of the Nomad Islands, in the southern Sea of Serpents
Terrain: Variable depth sea with intermittent islands and ``hot spots''
Intelligent Inhabitants: Few.
Creatures: Sea monsters.
Other Threats: Dense smoke and fog make navigation tricky. Hot spots. Occasional emissions of poison gas.
Useful commodities: Few.

Location: Southwest corner of Sea of Serpents, west of the Smoky Sea and East of the Pact Lands
Terrain: Small, geologically unstable volcanic islands.
Intelligent Inhabitants: Lizardmen
Creatures: Sea monsters, lizards, snakes, birds
Other Threats: Volcanic activity, earthquakes, tsunamis
Useful commodities: Pearls, minerals, lizardmen art, archaeological finds from a prehistoric human civilisation

Location: Western: on the west coast of the Sea of Serpents, off Hillesa. Eastern: On the east coast of the Sea of Serpents, southeast of Ellandria (off the coast of the Haunted Lands).
Terrain: Undersea areas where ruins of tall cities come near the surface. Act as artificial reefs.
Intelligent Inhabitants: Merfolk, water outsiders, other water creatures
Creatures: Sea monsters
Other Threats: Drowning. Guards and protections left by former inhabitants.
Useful commodities: Artifacts of a magically advanced Janni civilization; a few still work.

Location: Southeast coast of Sea of Serpents, South of Isthar, up to the Division Ridge
Terrain: Putrid swamp
Intelligent Inhabitants: Kobolds, lizardmen, some goblins near the ridge
Creatures: Oozes and plants, giant insects, other vermin
Other Threats: Mires, quicksand, poisonous food and water, strange gasses and fungi, etc.
Useful commodities: Quicksilver and other rare metals, medicinally and alchemically useful vegetation, spell components

Location: North of Isthar, along the east coast of the Sea of Serpents, and extending to some of the eastern islands.
Terrain: Hilly, lightly forested. Intermittent areas of wild overgrowth or complete barrenness.
Intelligent Inhabitants: Yaga's undead lieutenants and their minions. Many of her lieutenants are bound to their crypts, and control the local areas through their minions. Both the binding magic and the undead themselves have long outlived Yaga's banishment. They do not necessarily get along with each other, but each has a place of power where they are untouchable by the others, so an uneasy truce is maintained.
Creatures: Undead. Some constructs. Animals
Other Threats: Places of power take on the attributes of their undead overlords, and are generally well-protected by spells.
Useful commodities: Ancient magic items, usually but not exclusively evil.

Location: North-east, bordered to the south-west by the Haunted Lands, to the west by the Forest of Caerfallin, and to the east by Angwyn's Preserve.
Terrain: Dense forest, with some clearings and swamps.
Intelligent Inhabitants: Orcs, ogres, gnolls, trolls, lycanthropes, hags, outsiders, evil fae, evil magical beasts, Yaga cultists
Creatures: Tainted plants and animals, dire animals, magical beasts, constructs,
Other Threats: Morally corrupting atmosphere. Plant and animal life are twisted and frequently controlled by evil intelligences.
Useful commodities: Ancient magic. Body parts of rare creatures.

Location: Far north-west, north of Plains of Enkidu
Terrain: Hilly scrublands
Intelligent Inhabitants: Good to neutral dragons, e.g., Angwyn, Good to neutral fae and sylvan magical beasts, e.g., unicorns. Centaurs.
Creatures: Animals.
Other Threats: Humanoids not welcome, except in emergencies. Angwyn doesn't tolerate breaches of the peace.
Useful commodities: Dragon hordes might tempt the very, very stupid.

Location: Southwest corner of Sea of Serpents, between Molosh and Durin's Forge
Terrain: Hilly brush with deserts
Intelligent Inhabitants: Many kinds of aberrations, outsiders and monstrous humanoids. For example, sphinxes, minotaurs, dopplegangers, formians, slaadi.
Creatures: any kept as pets or allies by the above, or feral versions of the same.
Other Threats: Exploration and contact with the inhabitants of the Pact Lands needs the approval and supervision of the cult diplomats on the Isle of Peace
Useful commodities: exotic trade items manufactured by the strange inhabitants. Special crystals mined by the formians.

Location: From the south shore of the Sea of Serpents, to the Division Ridge. Starts east of Molosh , and ends at the Great Ooze.
Terrain: Brush and marsh.
Intelligent Inhabitants: Goblins near the Division Ridge. Kobolds and lizardmen throughout.
Creatures: Giant insects, vermin, dire animals, plants.
Other Threats: Food is unhealthy to eat. Strange mind- affecting plant life.
Useful commodities: Useful medicinal and alchemical plants and spell components.

Location: South of the Division Ridge.
Terrain: Desert. Hot, sandy, high winds.
Intelligent Inhabitants: Very occasional Janni nomads.
Creatures: Few.
Other Threats: Little food or water. The Poison Lake has water, but is deadly to drink. Heatstroke. Sandstorms. Occasionally, the soft rock of the plateau collapses, causing massive sanddrift cave-ins.
Useful commodities: The sand has high concentrations of rare minerals, but no one has found an economically feasible way of extracting them.