Arcadia is the home of the many races of the Fey.
Separated from Midgard by only a single step, the two worlds have much in common. Many plants and even some animals appear to have a common ancestry between the two worlds. Some of them many have passed accidentally through ancient rifts, while others have been deliberately transplanted from one world to another.
First among equals are the powerful Sidhe, who allied with humanity and the races of Midgard at the dawn of our recorded history. The Sidhe are the dominant culture on this world, though there are several contenders for dominant species, as powerful predators can threaten even well-defended Sidhe enclaves.