This is the category of modules or adventures taking place in, or featuring characters of, the World of Greyhawk campaign setting for the Dungeons & Dragons role-playing game. This is a subcategory of the general category for Dungeons & Dragons modules. It contains adventures either written specifically for Greyhawk, or written to be used in Greyhawk as well as other settings. The main category contains general adventures.
Note that some overlap may occur, as an adventure may be written for a number of settings.