The Uno Plane is divided by the Holo River, which flows into the Zero Gravity Sea to the north. The two sides of the world are known as West Uno and East Uno.
West Uno is characterized by tough weather, with dryness, droughts, and wild temperature swings creating hostile environments. This region is home to the Abandoned Beach, Sawtooth Cordillera, Jura Caves, Flat Forest, and Crystal Heights, the kingdom of the Luchas.
East Uno has a milder, mostly wet climate, making it ideal for the growth of moss and mushrooms. This region is home to the Cloud Archipelago, Wetlands, Fungal Jungle, Tabletop Hills, and Mushroom Hills, the kingdom of the Sentos.
At the heart of the Uno Plane, in the middle of the Holo River, is Momo Island, the source of Momoguro Energy. The Holo Bridge connects both sides of the Uno Plane and both kingdoms to Momo Island, which is located to the south.
West of the Holo River lies Crystal Heights, home of the Lucha Kingdom. Here, the combination of dry climate and mineral-rich soil has created giant crystal clusters and quartz formations, considered among the greatest cultural treasures of the Uno Plane.
Northwest of the Holo River, around where its stream meets the Zero Gravity sea, a vast stretch of woodland known as the Flat Forest, extends for miles. Flat Forest is where the history of Uno is grown and chronicled.
The forest’s flat pines simultaneously scribe and chronicle every event that takes place in Uno. As Uno's story grows, so the trees in Flat Forest grow.
Nestled in the easternmost part of the Plane, Fungal Jungle is the communications hub of Uno. A vast and intricate network of mushrooms, spores and mycelium carrying messages to and from every region across the land.
Many of Fungal Jungle’s Momo species have developed the keen organizational skills that are needed to work in the busy and bustling communications sector.
A natural underground network of tunnels, the Jura Caves are known for their rich biodiversity and are home to a variety of wild Momos. The fact that many of these Momos resemble appliances and gadgets from the 1980s is a mystery that is so far unsolved.