Seven Saints of Talis
The Wastelands is the name given to the massive desert that reaches across the entirety of the continent, formed by millennia of ecological devastation and the nuclear holocaust that effectively ended the War of Seven Saints.
It is, primarily, deserts of radioactive sands and radiological horrors, though it also encompasses bubbling sulfur springs, blasted mountain peaks, and dry, dusty valleys filled with the bones of the dead.
The Wastelands are chiefly the domain of the Reach, the largest kingdom found on Talis. Its towns and cities cluster around sources of potable water, whether that be underground springs, oases, or pre-War cities with functional filtration systems.