Subterra

Subterranea ("Subterra") is a semi-public deep mineshaft with a hub at -1000 nodes. Making extensive use of Technic, the hub operates machines such as a foundry, uranium centrifuge, and ice maker at low and medium voltages.
The hub features:
- Subterra Market, both a metal exchange that sells and buys ore and ingots and a general supplies store.
- Vending Machine, a Digilines machine with a graphical user interface to sell food in exchange for Grass.
- Foundry, a public Technic machine for bulk processing ore that yields two ingots per ore.
- Charging Station, a public battery station that charges electronics
- Ice Maker, generates Ice and simplifies crafts involving Bucket of Water.
- Residential, a sector containing condominium units with shared Protection.
- Zoo

Occupied units in Subterra Residential.
Blue Shroom Caverns

Blue Shroom Caverns is a public mining area at a depth of -2500 nodes and the native habitat of the Blue Illumishroom.
There is a rest area marked with a Simple Bed in an Item Frame where players can set a respawn point. The same area is also where the Crypt is located. If a deceased player is found in the caverns, there is a chance lost items will be retrieved and stored in the Crypt.
Emerald Shelf
Emerald Shelf is a mossy cave realm at a depth of -3900 nodes, known for its Glow Emerald stalagmites.