The Inexplicable yet Marvelous (Mis)Adventures of A Number of People
The sub-continent of Faerûn is set on the planet Toril, or, more formally, "Abeir-Toril."
The Sword Coast is a portion of the northwestern coast of Faerûn, and stretches from the city-state of Baldur's Gate, in the south, along the coast of the Sea of Swords, to city-state Waterdeep, and from Waterdeep further north to Neverwinter, Luskan, and Icewind Dale, the Arctic and northernmost region of the Sword Coast.
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 neighboring lands fertile and serves as a major trade route for the bordering nations. Next in significance is the Shaar, a broad region of grasslands in the south that, together with a large body of water called 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, Faerûn is bordered by a vast region of steppe that separates it from Kara-Tur. In the north are massive glaciers, named Pelvuria and Reghed, and a region of tundra. South of the continent, separated by the Great Sea, is a sub-tropical land called Zakhara.