Wikipedia
In the World of Greyhawk campaign setting and the default pantheon of deities for the third edition of the Dungeons & Dragons role-playing game, Fharlanghn, the Dweller on the Horizon, is the Oeridian god of Horizons, Distance, Travel, and Roads. He is a well-known deity on the world of Oerth. He wanders that world in person, his petitioners present in spirit form at crossroads and in mysterious oases. His symbol is a disk with a curved line representing the horizon, and an upturned crescent above that.
He is the brother of Celestian, and is said to make his home on Oerth. Fharlanghn is of neutral alignment, but his worshipers can be neutral along the good/evil or the law/chaos axis, or both. His holy symbol is a crescent over a curved road.