Karonleas
The 'City at the Edge of Reality', Karonleas was built by Taramis and the Dunoln to facilitate travel between the Planes of Reshomme and, more importantly, to allow Taramis and Schiraman to leave Reshomme entirely and travel through the Wild Sea in search of the Hub Sphere.
After the annihilation of the Dunoln Empire during the Age of Strife, Karonleas is believed to be the only surviving Dunoln city.
Karonleas is the only significant structure on its Plane, which lies amongst the Fringes. The city is built around a series of concentric, circular walls - each higher than the last. At its centre lies the Heart of Karonleas, a great, blue, gemstone monolith that contains the souls of the city's population as well as controlling and animating its guardians and allowing easy travel to all the other Planes.