A shattered, post-apocalyptic world. The lands are littered with technology that nobody has the knowledge to use or repair. So, now the tech level is akin to stone age.
There are no large settlements of the intelligent races, as aberrant creatures and undead are a constant threat and attack mercilessly. Most former cities are now crawling with these creatures, as well as evil humanoids and their demonic overlords.
The sky shifts from the total darkness of night without moon or stars, to a dim green light during the day with high clouds constantly moving in the winds that race toward the west.
While the temperatures are mild, the humidity and insects make the area highly uncomfortable. There are no seasons to speak of.