NTS and Lycanis said that if I posted this, they would help. (
I think it was them, anyway) 
The World of Cryulom
GeneralThe Caverns:
The Caverns are massive network of natural tunnels and caves, spreading out from one giant cavern. It is difficult to enter or leave The Caverns, mainly because no-one maintains the tunnels leading out, allowing stalagmites to block the exits. Plus, steam pockets located randomly throughout the tunnels make all travel without a water-pressure machine practically impossible. The Caverns have several tribes and one monarchy inside, all living in moderately stable peace, aside from a few wars over the centuries. 
The Surface: 
According to legend, when a volcano’s ash blocked the atmosphere, chemicals in the ash caused half of the sun’s heat to deflect. One race, unable to stand the cold, fled down to the unexplored caverns. The other race stayed on the surface. They now regret their decision, as while they can survive somewhat comfortably, war and natural disasters plague them━from smaller volcanoes to enemy nations tearing down their weakened walls. However, certain countries have managed to protect themselves, and build peaceful relationships with other nations. 
The lists below show a sampling of everything Cryulom has become. 
Inside The Caverns
- Webs
- Crystals
- Moss
- Curly Leaf Okakonasi 
- Dark
- Crystal spheres as currency
- Yellow diamonds
- Lizards
- Turtles
- Public transportation
- Deep blue water
- Snails
- Snakes
- Albino deer
- Black rabbits
- Salmon
- Water snakes
- Red/white striped crabs
- Clams
- People with limbs like spiders
- Coal
- Houses built on the cavern walls
- Spheres of crystal
- Amethysts 
- Wanted posters
- Stalagmites blocking tunnels
- Homes carved from stone
- Tribes
- Boats of tree bark
- Cold winds from above
- Iron
- Ballistas
- Roads lit by lava trenches
- Water pressure technology
Outside the Caverns
- Cold
- Outside is harsh
- Mountains
- Ice
- Stone monasteries 
- Old bridges covered in ice
- Strong winds
- It’s almost always snowing
- Lichen 
- Strongly-built humans
- Castles
- Small steam vents
- Volcanoes
- Penguins 
- Walruses
- Whales
- Icy oceans
- Icebergs
- Dark & rolling clouds
- Winding Paths up mountains
- Earth domes
- Food Stockpiles
- Arctic vines
- Valleys of pure ice
- Tunnels to Lower Cryulom 
- Comets
- Frequent meteor showers 
- Millions of visible stars
- Ice walls dividing countries
- Guards
- Steam machines
- Gliders
- Advanced weaponry
World Type: Flat
Society Type: Steampunk/ Gaslamp Fantasy
Thanks!