Here is a seed collection for mcpe I found . Post yours in the comments :).
CaptainSparklez:Dig down From spawn and you'll find golds and diamonds
zombie attack: Huge lava fall and unlimited stones
rainbow connection:similar to CaptainSparklez
frzw:Huge overhangs and caves
mt: incredible overhangs
aetherNETHER : Giant Mountains
nyan: as you already know this seed have two waterfalls and one lava fall next to spawn
titan5: Huge cave next to spawn
gravity is tasty : you spawn inside a big cave
rainbowdash: big waterfall
island plzz: huge floating island
love y bed : huge floating mountains
bogo: mysterious
Seed mega threads are no longer allowed in the seeds section. Please only post one seed per thread. If you would like to have a central place to post and find seeds from a list please refer to the pinned thread
CaptainSparklez:Dig down From spawn and you'll find golds and diamonds
zombie attack: Huge lava fall and unlimited stones
rainbow connection:similar to CaptainSparklez
frzw:Huge overhangs and caves
mt: incredible overhangs
aetherNETHER : Giant Mountains
nyan: as you already know this seed have two waterfalls and one lava fall next to spawn
titan5: Huge cave next to spawn
gravity is tasty : you spawn inside a big cave
rainbowdash: big waterfall
island plzz: huge floating island
love y bed : huge floating mountains
bogo: mysterious
Seed mega threads are no longer allowed in the seeds section. Please only post one seed per thread. If you would like to have a central place to post and find seeds from a list please refer to the pinned thread