Slumberland

The realms of the Mighty King Morpheus are splendid and sun-dappled plains, dotted here and there by small towns, interconnected by roads for horse-drawn carriages and oddly enough a rickety railroad and train, surrounded by warm, peaceful woodlands filled with the smells of sweet leaves and the sounds of scurrying little creatures. Just one of what was once many Dream Lands, Slumberland is a world of vibrant color, of limitless imagination, and, though it is quite fantastical in its own right by its very nature, it is perhaps equally shaped by the ingenious mundane artifice that springs boundless from the mortal mind. The people of Slumberland are... varied. Humans seem to be a rarity, replaced by a rainbow of diverse humanoid citizens, nearly no two of whom seem to belong to the same species even. It is not uncommon to see men and women with the appearances of dogs or cats or mice or frogs even, and stranger things besides. This broad coalition celebrates their craftsmen and scientists and revels harmoniously in a glorious and enlightened Renaissance.
The City of Som, all pink and orange brick and dazzling minarets, domes, and ceramic facades, surrounds Castle Dreamstone and stretches to fill the Dreamheart Island that sits in the center of the Lake of Lilies. Open woods of white birch and golden gingko wreath much of the western and southern edges of the island in stunning foliage and rainbow-scaled carp and large, orange koi swim in the waters of the Lake, seeking their food under the veil of the waterlilies that float on the surface.
An even larger city stands just across a short bridge over the water south of Som, the bustling city of craftsmen, cooks, teachers, soldiers, etc that serve the kingdom, the city Belnocht, booming with trade in all the finer things in life, the place everyone wants to be and where anyone can always find whatever their heart desires. Further south, Belnocht once overlooked the strange Crystal Cairns scattered throughout the multicolored Painted Desert, but the desert seems to have vanished. The soldiers of Slumberland's royal armies have been tasked with defending Belnocht from what can only be described as Nightmares attacking from the Void where the desert once lay.
A series of smaller islands to the west of Dreamheart, each with little villages populated by the short, yellow Boglins, the fish-headed, webbed-fingered and toed Sgoauguin, and the fair, seabound Gillies possessed of human-like torsos whose legs have been replaced with fins, tentacles, and other oceanic appendages who collectively make up the settlements of Wizwishle. Each island plays host to gorgeous wetlands dense with spry, flexible trees and hundreds of species of birds, insects, lizards, and frogs in every color of the rainbow. Griffapotamuses bob through the gnarled marshwillows and horrid Snactherbandits stamp through saplings and spread their webs to snare the unwary. The Wishlewush Wizards of Wishmarck Academy dwell deep in these jungled islands, highly regarded throughout Slumberland for their wisdom and knowledge of history, medicine, and of course magical spells.
To the east lies the tall cedercaps and the wide branching amanitoaks of the Gyraaga Vale, a verdant forest of gargantuan, elder mushrooms, and at their edge, the city of Stalkhaven, a place for stalkjacks, carpenters and carvers, artists, writers, herbalists, hunters, and apothecaries to ply their trades. Home of the famous doctor, Cornelius Genius, a prolific man of science and medicine, now retired, who once taught many subjects at the Stalkhaven College of Arts and Science. One must be careful travelling too deep within the Vale these days... the stalk grows unnaturally dark ere long and several wanderers have become lost to never return.
North of Dreamheart lies the town of Erstwehn, in the shadow of the Blackspire Mountains. Just past the northern edges of this stalwart and vigilant community of miners, masons, and smiths lies the Salamog Swamp within which a fearsome artifact has been hidden - the Dragon Door, the entrance into Nightmareland. The Swamps have become dark and twisted and the creatures that once dwelled there have been completely displaced by Nightmares pouring forth from the Dragon Door. The trees are said to be dead, but walking, and ashes and oily black feathers fall constantly from the eerie sky filled with black clouds through which green lightning occasionally flashes.
Though Little Nemo once defeated the Nightmare King as a boy, the dark realm known as Nightmareland can only be sealed away, not utterly destroyed. It was once possible to travel to Nightmareland on foot, its lands directly connected to Slumberland's, but King Morpheus sundered the connection and closed shut a magical gate that prevented anyone from accidentally wandering to Nightmareland, or anything from Nightmareland skittering into Slumberland. This Dragon Door was hidden in the swamps north of Erstwehn, and sealed with a great key that was entrusted to Nemo. But somehow, when Nemo got trapped in this world, as he traveled between Earth and Slumberland, the key became lost. Now the Dragon Door is open and Nightmares roam free, plaguing Slumberland's countrysides and spreading soldiers and warriors thin, defending the once-peaceful kingdom from invasion on all sides.