User blog comment:Sharple/Stronghold Found!/@comment-5172455-20120506121420/@comment-3317329-20120509021043

There are Three dimensions in the game. The Overworld, which is like the real world except blockier, and its where you spawn in, The Nether, which is a hellish world that you can only enter by building a obsidian portal and lighting it on fire, the Nether itself is large and is made up mostly of netherrack and soulsand, there is a large amount of lava lakes and many floating islands and loose land formations in the Nether. There is also the End which can only be accessed via End Portal which can only be found inside a underground stronghold which is kind of like a underground prison. Most of the time you can find a portal in the strongholds but in Sharpies case you can't :P. The End is a large End-stone (white-ish block) sphere type world with an open roof. The entire world is hovering over a bottomless pit that makes you fall out of the world should you slip and enter its clutches. The End has a large amount of Endermen, and a Ender Dragon. The Dragon is a deadly mob that can only be killed after all the large towers in the End are destroyed, as they give the dragon health.