Below Ground Adventures
Up until four centuries or so ago, the Moon Hills and the surrounding Nentir Vale (map) were thinly settled borderlands, home to quarrelsome human hill-chiefains and remote realms of nonhumans such as dwarves and elves.
With the rise of the empire of Nerath to the south, human settlers began to move up the Nentri, establishing tows such as Fastormel, Harkenworld, and Winterhaven. A Nerathan hero named Aranda Markelhay obtained a charter to build a keep at the portage of the Nentir Falls. She raised a simple tower at the site of Moonstone Keep three hundred ten years ago and under its protection the town of Fallcrest began to grow.
(This is the current geographic setting of the campaign)