The brain is a world consisting of a number of unexplored continents and great stretches of unknown territory.
The whole world of thought lay unexplored before me, - a world of which I had already caught large and tempting glimpses.
We have at last glimpsed the surface of the fabled world, Titan, Saturn's largest moon and the greatest single expanse of unexplored territory remaining in the Solar System today.
The ocean is this beautiful, unexplored place. Why on Earth everyone isn't down there, I don't know.
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