Allright, this comes from the player guide about planes.
Just to make certain things a bit clearer.
3.2.1. Yliakum
Yliakum is located thousands of meters under the surface inside a huge excavated stalactite, hanging inside a cave so huge that it could contain any kingdom of the surface. For this reason it is structured in grades - like Dante\'s Inferno - and each grade is smaller than the former. There are eight grades, or levels. The two highest levels are above the point where the stalactite connects to the roof of the cave.
3.2.7. Travel
The Slow Way
Long stairs that wind along the walls or corridors dug deep into the rock connect every adjacent level. Most citizens walk from level to level, even though such a trip is very tiring, especially when going uphill with a load of goods. Because of this, wide landings were built where they can lay down their loads and rest.
The Merchandising Way
Because walking is so slow and cumbersome, an ingenious system of pulleys, wheels, and spider silk ropes was devised. These silk ropes attach to either people or goods and are then lifted up. The winches are privately owned, however, so generally they only belong to the mercantile society, and their use is allowed only after a fee is paid to the society, which varies according to the quality of the winch.
The Elite Way
The fastest way of getting over remarkable distances in a short time is using flying animals: Pterosaurs and Megaras.
