In 1973, after a series of earthquakes, a fissure opened up on the eastern side of the Icelandic island of Heimaey. As the eruption developed over time, it became more dangerous, and a variety of measures were undertaken to stop the flow of lava.
When Mount Vesuvius erupted in August of 79 AD, Pompeii was buried in volcanic ash and rock. As time passed, Pompeii was forgotten. Learn more about the catastrophe that destroyed Pompeii -- as well as the city's rediscovery -- in this podcast.