K2 is the second highest mountain in the world, at . It is also known as Mount Godwin-Austen or Chhogori. K2 is part of the Karakoram range. It is located partly in China and partly in Pakistan. The name K2 came from the first survey of Karakoram. At that time, the surveyors gave each mountain a simple label of "K" followed by a number.