Home to the majority of the population of Cave Walkers. It is here the older creatures live. Just like above there are markets and entertainment, but below gives the little ones more chance to cause trouble. The city is carved out from the underground cave walls of Kahlen. Certainly a change in life from the above desert. Small chunks of crystals are used for light down here, but Moss Light is closer to the surface than other cities, and therefore wholes in the cave ceiling have crumbled away to reveal the light of the sun.

The bathing caverns, the name stands for what it's there for. The water is heated by the underwater crystals making it a good place to soak and relax. Lone puddles are higher up and more cool for those who wish for the temperature change. Ladders made of heavy vines and thick tree branches are strapped to the cave walls to provide access to the pools higher up.

Electric Current is one of the many cities underneath Kahlen's surface, There are no crystal formations here hence why they use the electricity to light up their world. Thick cords run the length of the cave ceiling as well as the walls. The city is usually quite busy and even into the night there is a great amount of noise from workers who trade shifts to keep the electricity up and running.

The Misty Caverns are home to many strange things, plants and animals alike. The mist comes from the water far below and the steam that rises up. These caverns are one of the ways in and out of the cities below, but dangerous. Magic-folk are often sent here on quests for greater knowledge as it is rumored a great dragon slumbers with the rock and steam.

The Heart is, of course, the heart of the underground world. It is a city in itself but holds the mother crystal, the largest, most powerful crystal ever found in the underground world. The city is home to mostly royalties as well as the Cave Walker leaders and council.

Plants grown by the magicians of the Cave Walkers, this place is the main life source below ground and the only place with green life on Kahlen, It is small, no more than a spot of green against the brown. it's energy is slowly spreading outwards from the stones and crystals. The Cave Walkers hope that one day the life there will spread for countless miles. Many of the magic users live here, specifically the Time wardens which guard the sacred place.