Cartesium

Capital city of the greatest empire ever forgotten, Cartesium is a city created by a society whose every mechanism is centered around weaving. They manipulated magic, alchemy and engineering beyond anything present-day Grea Weralt could even imagine. Accessible only by weaverially activated portals scattered throughout the world, Cartesium exists within a pearlescent bubble held deeper underground than even the earthfolk dare venture.

In its prime, it was a masterpiece, a magnum opus of the society within. Scarlet spires tall as mountains, numerous as trees in a forest, spanned as far as the eye could see. To those with an aerial view, it would have been a lively anemone out of water. And to those few with the know-how, the many spires could be relocated at will.