The fungus which often forms a white blanket on exposed subterranean dirt can be tilled, allowing new crops to be grown
Decorative and functional as a beacon base
Friendly denizens of the underground which love cavern vegetables and can be farmed just like their overworld counterparts. They also give milk.
Mainly flat, open areas in caves
An example of intersecting cave features
Giant cavity filled with water, glowing grass, and aquamarine ore
A Granite Canyon with stained glass decorations
A new plant which needs lava for warmth and whose sturdy reeds can be crafted into planks
A ravine with a chest and some biomes
Vines and mossy cobble
Decorations for a tunnel
Overall flat area usually with a small shelf above the rest
Sometimes massive chasms with magma and lava at lower levels