Sunless Sea

The Sunless Sea was a great subterranean lake that lies under the land of Narnia. The capital of Underland, a great seaport, was located on its pale beaches. All outlets to the Overworld lie on the other side of the Sunless Sea, with the exeption of the secret tunnel dug by the Earthmen (under the spell of the Lady of the Green Kirtle in preparation to invade Narnia. The Sunless Sea, along with the whole Underland were unknown to the surface world until the capture of Rilian. After the return of Rilian, Narnians would go on boating trips on the sea and tell each other stories of the land of Bism.