Greyhawk is a fantasy campaign setting for the Dungeons & Dragons role-playing game. Created by Gary Gygax in the 1970s, it features a rich world filled with diverse cultures, powerful magic, and epic adventures. The setting is known for its detailed geography, including the Flanaess, a central continent where many adventures take place. The city of Greyhawk serves as a hub for adventurers, offering various quests and opportunities. The setting includes iconic characters like Mordenkainen and Rary, as well as numerous factions and deities that shape the world. Overall, Greyhawk remains a beloved and influential part of tabletop gaming history.