Faerun

The continent includes terrain that was is varied as any other. Besides the exterior coastline to the west and south, the most dominant feature on the continent is the Sea of Fallen Stars. This is an irregular inland sea that keeps the interior lands fertile, connected the west and east regions of Faerun and serves as a major trade route for many of the bordering nations.

Next in significance is the Shaar, a broad region of grasslands in the south that, together with the Lake of Steam, separates the area around the inland sea from the coastal nations at the southern edge of the continent. To the east, Faerun is bordered by a vast region of steppes from Kara-Tur, and in the north are massive glaciers (Pelvuria and Reghed) and tundra. South of the continent, separated by the Great Sea, is the sub-tropical land of Zakhara.

Regions

Northwest Faerun
A region of wilderness, difficult winter weather, orc hordes, and barbarian tribes, this region is generally referred to as "The North", which also contains most of the "Sword Coast North". It is a mostly untamed region that lay between the large Anauroch desert in the east and the expansive Sea of Swords in the west, north of the High Moor.

North Faerun
This region stretches from the wide Anauroch desert in the west to the eastern edge of the inland Moonsea, in the northern region of the continent. It is a region of contrasts.

Northeast Faerun
This remote area begins in the cold, forbidding lands along the great ice sheets and continues south toward the northeastern shores of the Sea of Fallen Stars, collectively known as the Cold Lands. It is bordered on the west by the mountain-hemmed land of Vaasa and stretches east to the vast steppes of the Hordelands.

West Faerun
This region includes the nations south of Waterdeep and north of the Shining Sea that border along the Sea of Swords. It encompasses both the majority of the Sword Coast and the Lands of Intrigue.

Interior Faerun
With the exception of the Shining Plains, these lands lay along the irregular coastline of the western Sea of Fallen Stars. In the north, the Dragonmere arm of the sea extends far to the west, ending close to the Western Heartlands. To the south, the Vilhon Reach form a second arm leading to the southwest.

East Faerun
Most of the nations in this region border the eastern expanses of the Sea of Fallen Stars. Here the sea forms a long arm that travels to the east before turning south to become the Alamber Sea. The northern nations of this mysterious area are termed the Unapproachable East and the southern nations the Old Empires, and, for a time, the Empires of the Alamber Sea.

Southwest Faerun
This region lays along the great Chultan Peninsula that jutes out toward the west. The waters to the north are named the Shining Sea, a body bounded by Calimshan to the north and joined to the Lake of Steam through the Straits of Storm. To the south of the land was the Great Sea.

South Faerun
The Shining South lay to the south of the regions around the Sea of Fallen Stars, being somewhat isolated by the Lake of Steam in the west and the vast length of the Shaar. It is bordered along the south by the Great Sea, to the west by the Chultan peninsula region, and in the east by Luiren. 

Southeast Faerun
These lands lay to the south and east of the grassy plains known as the Shaar, along the shores of the Great Sea opposite the land of Zakhara.

Underdark
The immense complex of caverns and passages that lay beneath many parts of the continent of Faerun.