Tharn Port is a location that is mentioned in Shadowgate & Shadowgate Classic pc versions. It also appears on a map at the end of the game. It is also mentioned in the book in the library The New Atlas.
Tharn Port is one of the few outposts along the edge of the Westland Sea in Westland. Beyond the sea is also unknown. What little is known comes from the writings of Terman the Voyager, and these speak vaguely about creatures of immense horror and lands of unclaimed riches. Tharn Port lies to the north of Lake Orra and Meadowdale.