The desert of Mareth hides the sole mostly-pure enclave, the magic city of Tel'Adre. It is also home to cum witches, giant sentient ant people, and numerous demonic entities.
The desert is home to a number of intriguing corruptive presences, and a fair few secrets. Storylines here tend to be more intense than the Forest and Lake content. Tel'Adre is its own separate "place", these encounters occur out among the dunes.