Aslan's Country

In The Voyage of the Dawn Treader, the third published book of the series, King Caspian X of Narnia sets out to the eastern edge of the world to find the fate of the seven lost lords of Narnia. At the end of the voyage, Reepicheep, a talking mouse, goes directly to Aslan's Country. (VDT Ch. 16)

At the beginning of The Silver Chair, Eustace Scrubb and Jill Pole escape from bullies at a boarding school in England and find themselves in Aslan's Country, where they meet Aslan. They are then blown to Narnia by Aslan's breath. At the end of the adventure they find themselves back in Aslan's Country. There they witness the resurrection of King Caspian and, after Aslan promises them that they will one day return to stay, they are sent back to England. (SC Ch. 1,16)

At the end of The Last Battle, there is a stable door that leads to Aslan's country. Initially, it only led to a stable used by Shift and the Calormenes as means to control Narnians by claiming it to hold the false god "Tashlan". But after the final battle before Narnia's end, the stable door becomes a site of final judgment for all Narnians, living and dead. For those who have faith in Aslan—including the deceased Pevensie children (excluding Susan), Eustace Scrubb, Jill Pole, Digory Kirke and Polly Plummer—the door leads to Aslan's country. However, Narnians who abandoned their belief in Aslan and acted in evil are sent to an unmentioned place whose identity even the author claims not to know. The animals in that category lose their ability to speak. Once the final judgment is complete, Narnia's end comes full circle when the country is then reduced to a tundra wasteland after its plant life is eaten away by the Dragons and Salamanders, the Sun is crushed by Father Time, and the land flooded while the heavens are undone.

From there, Aslan's country is explained to be where the "Real Narnia" begins, identical to the old one yet without any imperfections. It is also discovered that England and all other countries and worlds are promontories of the Great Mountains of Aslan's Country. All worlds in Creation have their perfect nature in Aslan's Country. So, it is also home to creatures from other worlds who came to live there after their death or the end of their world.