Indonesia has about 130 active volcanoes. The country is made up of more than 15,000 islands situated on several fault lines called the Pacific Ring of Fire, making it prone to earthquakes and volcano eruptions. Above, Mount Merapi spews volcanic smoke as seen from Deles, Indonesia on Nov. 1.
Mount Etna hurls a fountain of fire skyward as rivers of lava spill down its flanks. In spite of its dazzling displays, Mount Etna is a relatively safe volcano with rare, compact eruptions and slow-flowing lava that gives people a chance to escape.