Ghelspad
Ghelspad is the first continent of White Wolf's Scarred Lands setting. As a result it hosts the core of that lore. Since this line started out coterminously with the Third Edition itself it accumulated a LOT of lore over the 2000s first decade.
The place is Not Europe, like many such settings, but luckily for us the designers knew it and did their bestest to infuse some originality to it all.
Some notable sites, often getting their own book:
Calastia is the continent's Lawful Evil Empire, like Cheliax over in Golarion. Human. The Charduni do the Lawful Evil down Termana-way.
Hollowfaust is a city-state of necromancers. These are the grey-hats; they work with the undead, but aren't up for full Necronomicon deals with the Dark. There's a splinter group, the Crypt Lords, who have their own settlement. Their crunch is in Relics & Rituals.
Hornsaw is titan Mormo's forest, and good riddance.
Krakadom is Dwarf Deliverance. We never got more lore about Forsaken Dwarves beyond what Creature Collection divulged but, well... you might not want to know.
Vesh is the Athens-style democracy with a somewhat limited franchise. The Vigilants protect this place from enemies. Not to be confused with Vashon, another site here. The main designers lived in North America's North Pacific.
One problem this sub-setting has is the same problem that Krynn and Greyhawk had: the lore became so detailed, that it crowded out the DM's room for creativity.