Ravine is a new type of randomly generated landscape, which can be useful to the player because of resources that can be found there.

Ice peaks is pretty rare biome, but two villages in that biome is even more uncommon phenomenon.

Ice peaks biome is very rare, but very beautiful place, so as taiga - you will be able to quickly find them both using this seed.

Mineshaft is always a nice thing to find, it contains a lot of resources - mostly gold and iron.

Another unusual biome with icy spikes, that you may never see during playing Minecraft.