Imagine a 2,300-mile stretch of mountains all within one country. That's Australia's Great Dividing Range, an awe-inspiring series of mountain ranges — a cordillera — that runs from Dauan ...

The Andes are the world's longest mountain range. This causes lava to erupt out of the gap that is left. As it cools down, the lava creates a long line of mountains under the ocean called the Mid ...