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A league is an old, almost archaic, measurement unit of length. It is three miles...nautical miles at that.<br><br>So 20,000 leagues under the sea refers to the length of their journey...approximately 60,000 miles. Hard to travel 60,000 miles on a planet that has a circumference of a little under 25,000...but they went back and forth some, so cut the author a little slack here.<br><br>Never make the mistake that the 20,000 leagues refers to depth instead of the length of the journey. The ocean just isn't that deep.

I was just wondering why the novel is called 20 000 leages under the sea? If anyway knows why could you please help me understand.