Seed Code: Bambi
Yaay! First seed for 1.
X: 190 / Y: 30 / Z: 200
A big lavafall inside a big cave system. You'll find the entry at (130|30|170)
X: 77 / Y: 77 / Z: 177
Large taiga biome mentioned in the description.
X: 280 / Y: 60 / Z: -50
Jungle! Big trees and stuff. So if you always dreamed of playing Tarzan in Minecraft, here you go.
X: 36 / Y: 71 / Z: 211
Badass grass is badass. Badass grass grows where it wants to grow. It doesn't care if this is floating in the air above a lake of surface lava. Badass grass decided to grow there, and so it will.