The realm of the Fae. It is dominated by two factions that have been engaged in millenia-long “war” of sorts, the Seelie and the Unseelie. The Seelie are also occasionally known by their other sobriquet, “The Summer Folk”, whereas the Unseelie are similarly called “The Winter Folk”.
In his memoirs, Lt. Donaldson of Her Majesty’s 23rd Advance Scouts, describes Faerie as being composed of (at least) four realms; Greater Summer (Summer), Lesser Summer (Spring), Greater Winter (Winter) and Lesser Winter (Autumn). Donaldson further suggests that there may be further realms corresponding to those fae elements relating to shadows, darkness and the phases of the moon.