In The Nether - As the name states it has something to do with the nether, the nether in this seed has a quite big open area and has some caves

Jurassic Pork - This world has a large desert area with a few lakes and ponds , it also has a few mountains and caves, one of them lead to redstone

666 - This world has groups of mountains throughout the land with a lot of overhangs and caves, there is also a large desert too

Sosaria - In this seed you will find a lot of mountains with caves at the base of them, even found a cave that led straight to diamonds

lucie - Another seed with mainly water, it has a few small islands and pretty much no trees, but there are a few mushroom bi-omes

Maxwell - This world has mostly water with a few islands, on the islands you will find mushrooms bi omes and even a mooshroom!

notrees - This seed has to vast plains, one being a grassy plain with no trees and the other a sand plain. On the other side of the map you will find a snowy forest area

Porkaxe - This seed has a lot of mountains some with surface caves, there are also a lot of villages in this one and you also spawn near a lava pool

gargamel - This seed is awesome, tons of mountains,tons of cave systems due to the mountains you will find surface iron, maybe even gold....

worstseedever - Not a bad seed at all due too the vast amount of diamonds and gold plus a huge cave system to explore

The Best Seed - This seed really doesn't live up to its name, all there is here is a few small islands of green, hardly any trees at all and lots and lots of water...Sigh

beagle bagle - This code has a long of cliffs and forest areas with some cliffs having massive overhangs

sunnyd - This seed starts you on in a dense forest area if you explore further you will find a large mountainous terrain with surface caves around them.

pasta - This seed starts you off on a grassy plain will a huge single mountain surrounded by water,  also there a weird floating block formation that looks like an un-finished mountain. Few pumpkin patches too along with a massive cave system.

lemonlime -  This seed started me off on the side of a mountain, There are also complex side mountain cave systems...beware, on has a huge almost hidden hole in it

milkyhands - This world seed start you off in a vast snowy wilderness with frozen ponds and lakes, there are a few trees and and some surface cobblestone here too.

QWERTY - This code started me off at a small pond of water, with a large dessert nearby. Also found a pumpkin patch quite close to the start off point. Quite big cave system in this one too!

The world seeds are custom codes that generate the worlds in Minecraft. If you don't put a seed code in then you will get a random world to play on. All of the seeds are case sensitive and will not work if you don't not include capital letters

hell - This ones a pretty good seed, it has a lot of lava around. you may find obsidian due to the lava being close to a water source

This is a page dedicated to Minecraft seeds for the Xbox 360
I will be detailing the environments of the seeds/worlds when i explore them.