Nepal has the greatest altitude change of any location on Earth. Nepal lies between China and India in South Asia. The lowlands are at sea level and the mountains of the Himalaya are the tallest in the world. Mount Everest rises to 8848.86 meters and is the world's highest peak. The Himalaya formed 10-15 million years ago when India collided with the continent of Asia and pushed the land into high mountains. Eight of the world's ten highest mountain peaks are in Nepal.