The Himalayas contain some of the highest mountains in the world, including the highest, Mount Everest with a peak of 8,848 metres (29,029 ft) above sea level.
The Aral Sea was once one of the four largest lakes in the world. It has been steadily shrinking due to Russian irrigation projects. In 2007, it was only 10% of its original size.
The Caspian Sea is the world's largest enclosed body of water (by area).