Board Thread:Questions and Answers/@comment-77.10.96.236-20130317195513/@comment-5625597-20130324052926

It looks like you got stuck in Limbo. "There are only two ways to escape Limbo. The first is to find two columns of Unraveled Fabric, which represent a gateway back into a random dimension.

The second is to dig down deeper in Limbo, until you find a black void near the bottom (composed of Fabric of Reality). Touching these will teleport you back to the Overworld, but to an entirely random location." -Tekkit Lite Wiki