Tirian looked round again and could hardly believe his eyes. There was the blue sky overhead, and grassy country spreading as far as he could see in every direction, and his new friends all round him laughing.
“It seems, then,” said Tirian, smiling himself, “that the stable seen from within and the stable seen from without are two different places.”
“Yes,” said the Lord Digory. “Its inside is bigger than its outside.”
“Yes,” said Queen Lucy. “In our world too, a stable once had something inside it that was bigger than our whole world.”
- C. S. Lewis, from The Last Battle (The Chronicles of Narnia)