Minecraft wiki entry for The_End, associated text: The End's outer islands are more diverse than the main island. When a player enters one of the End gateway portals that generate after killing the dragon, they are instantly teleported over the ~1000 block void to the outer islands. These gateway portals are easiest to enter through the use of ender pearls, due to the one block tall gap between the bedrock blocks, but can also be entered by placing water and swimming through, using a trapdoor or piston to force the player to crawl, or with skilled use of a pair of elytra.