Minecraft PE Seeds!!  Might as well start off with the most classic one, this pe seed is called nyan.  Type it in and lets start playing the nyan world.

I have no coordinates to give you directions so I will try and reference the spawn point.  Here is a screenshot from the spawn point:

 

Giant lavafall, mountains, and

lots of different biomes.  There is a good reason nyan is the most popular minecraft pe seed.  Lets keep moving.

Here is a screenshot of the spawn point from a distance, note the two lava falls and waterfall as well as the massive mountain range:

Here is a shot of the backside of the mountain range, yet another lavafall and waterfall.  Absolutely stunning!  This seed for minecraft pe is a winner!

Around that side of the mountain is this huge cavern into the side of it, time to explore!

Its a dead end, but start mining and let me know what you find.