In the ancient past, the world of Azeroth was comprised of one major continent called ancient Kalimdor, but had four known regions. Ulduar is located in the north, Hyjal and Un’goro crater in the west (with Uldum in the southwest), Uldaman in the east, and the Vale of Eternal Blossoms in the south. At one time, all of the four major continents (Eastern Kingdoms, Kalimdor, Northrend, and Pandaria) were part of this one large super-continent. The Well of Eternity lay in the center of what was ancient Kalimdor and was created when Aman’Thul ripped Y’Shaarj out from the embedded location there.
When the Well exploded at the conclusion of the War of the Ancients, this continent was shattered, leaving behind the continents and islands that exist today. The Forbidding Sea is the expanse of water to the east of the Eastern Kingdoms and the Veiled Sea sits west of Kalimdor. Between the continents lies the Great Sea, while at its center lies the Maelstrom — a massive chaotic whirlpool over the area where the Well of Eternity once stood. It’s believed that a part of the Well still exists in the Rift at the bottom of the vortex. It has been active since the Great Sunderingten thousand years ago and still there is no foreseeable natural end to its existence.
The world of Azeroth also may have land located at the other side, beyond the Veiled Sea to the west of Kalimdor, and beyond the Forbidding Sea to the east of the Eastern Kingdoms. No one is sure or has knowledge of what kind of creatures, lands, cultures, life, and sentient beings live in the other side of Azeroth. It is likely, though, that it is very dangerous.
“A handful of ships have ventured from Kalimdor away from the Maelstrom — to the north, west, and south. None have yet returned.”