Timeline, connection details, world downloads, maps.
A new world created for version 1.3.x. No world download is available at this time, but a live map is.
Another world created for version 1.2.x shortly after the previous one. It ran for a very short period of time.
A world created for version 1.2.x and retired after a short period of time. The first world with hard mode enabled.
The original world created in version 1.0.x and retired sometime afterward. Created around the release of Terraria.