Invisible Bedrock

Invisible Bedrock or Barrier is an invisible, indestructible Block which surrounds all Old Worlds. It is only obtainable by Inventory Editing.

Interaction
When placed, it can be seen through; however, it cannot be walked through or destroyed, even in Creative Mode.

Trivia

 * Projectiles, such as Arrows or Snowballs can pass through Invisible Bedrock but will never hit anything.
 * If the Player goes high enough in an Old World, the Player would be able to walk on a layer of Invisible Bedrock in a dimension dubbed The Cloudland. However, building on top of this is not possible, because of the world height limit (128 blocks).
 * If the Player spawns Mobs from Spawn Eggs in the Invisible Bedrock they will suffocate.
 * In the Lite version, hitting this block will give off rock particles, even though this block is meant to be invisible.
 * If the Player falls on Invisible Bedrock/Barrier from 4 blocks or higher it will give off Stone particles.
 * If the Player spawns mobs on a tower of blocks built to the world height limit, and pushes them onto the Barrier, they will disappear.
 * After Update 0.9.0, Ladders and Fences will no longer connect to Invisible Bedrock.