Dimensions

There are 3 dimensions in Minecraft, the Overworld, the Nether and the End. the Overworld is planet Earth of Minecraft, where you spawn and live first. Then, there is the Nether which the portal can be built with obsidian and a flint and still. The Nether is a dimension that is in part similar to Hell because there is a lot of lava in that world. The End hasn't a constructible portal, but it can be found by launching eyes of Ender and they will give the portal position. The End contains a dragon called the the Ender Dragon that can be killed and with that you win a massive amount of experience! Then you come back to the Overworld. Comment if you like and see you. 

OverWorld

Nether       

The End