The document discusses several natural heritage sites including: 1) Pamukkale in Turkey, known as "Cotton Castle", which features mineral-rich springs that have left calcium deposits forming pools and waterfalls over thousands of years. It is also the site of the ancient city of Hierapolis with Greek and Roman ruins. 2) Jeju Island in South Korea, which contains three areas added to the UNESCO World Heritage list in 2007 - lava tube caves, a volcanic mountain, and Mt. Halla, providing an extraordinary record of geological history. 3) The document provides images and definitions of key terms like "monument", "volcanic", "eruption", and