In which fantasy world do the Pevensie children discover magical creatures and a talking lion named Aslan?

Narnia

C.S. Lewis opened the door to "Narnia" in "The Lion, the Witch and the Wardrobe," inviting children to explore a world where magic is real and battles for justice are fought by unlikely heroes. Narnia, with its tales of courage, sacrifice, and redemption, has captivated the imagination of generations of readers, becoming a classic of children's literature. The adventures of the Pevensie children in this enchanted realm, alongside Aslan the lion, highlight themes of faith, hope, and the fight against evil. The "Chronicles of Narnia" series continues to be a source of inspiration and escape for children and adults around the world.