Farlands is not like the ordinary maps you download. In fact is that the entire map is what once was a world generation glitch in one of the earlier versions of Minecraft for PC. Because of its weird but incredibly cool terrain it has gained a lot of traction and was quite soon released as a map for the PC version of Minecraft and later on ported to Minecraft Pocket Edition.
The entire map is made out of multiple layers of landscapes packed on top of each other. On the top surface there are also loads of high walls separating areas from one another. If you want to try something different then here is a perfect map!