Spawn

The Spawn, at coordinates (4174, 64, -4) is where it all started. About 10 minutes after the world started, Morgan created a Nether Portal from a Lava Pool near Spawn (not that they needed it yet, Morgan just wanted to show off).

Later-game, Morgan mined one obsidian from the portal with his fist, as it was messing up the Nether Highway. The Disc is located a few hundred blocks away from Spawn, on some better land.