There are three types of volcanoes: active volcanoes that have erupted recently and may erupt again, dormant volcanoes that are currently inactive, and extinct volcanoes that will never erupt again. Some examples of active volcanoes discussed are Kilauea volcano in Hawaii, the most active in the world, and Arenal volcano in Costa Rica that tourists visit to see eruptions at night. An example of a dormant volcano is Mount Fuji in Japan, while Anatahan volcano was thought to be extinct but erupted in 2003. The eruption of Vesuvius volcano in Italy buried the city of Pompeii in ash, killing many people, with the ruins being discovered in 1595. Under