Mount Everest the tallest mountain in the world

The Ötzal alps near the Austrian Italian border

Mount Olympus in Greece

Tree covered with brown moss in Valle d'Aosta in the Italian Alps

Cross on a mountain in the Swiss Alps

A mountain is a large natural rise of the Earth's surface that usually has a "summit" (the name for a mountain's top, which can also be called a peak). It is usually steeper and taller than a hill. By definition, mountains are often thought of as being a hill which is higher than 600 meters (about 2,000 feet). However, some definitions say a mountain is a hill higher than 300 meters (about 1,000 feet).