Minecraft wiki entry for Development_versions, associated text: Boulders.
Ice patches.
Ice spikes.
Lakes.
Double plants.
Tall Grass.
Trees:
Jungle trees (small and large)
Mega Jungle trees
Mega Spruce trees
Acacia trees.
Version exclusive Fallen trees.
Version exclusive Oak trees (swamp and large oak variants).
Huge mushroom.
Mossy cobblestone boulder.
Lilypads.
Vines.
Melons.
Pumpkins.
Dead bushes.
Dungeons.
Desert wells.
Fallen logs and stumps.
Emerald ore.
Caves.
Lava at the bottom of caves
Caves in desert and mesa
Strongholds.
Villages
Abandoned mine shafts.