8. Popocatepetl, Mexico
In Mexico, there are over 3.000 volcanoes, but just 14 of them are active. The tallest is the volcano Popocatepetl, that is also characterized as an active volcano, reminding about this to those 25 million people who live at its feet quite often.
The last time, the Popocatepetl erupted in 2000, but it periodically throws columns of ash and smoke for kilometers high.
With so many people living within the area, Popocatepetl is one of the most supervised volcanoes in the world, mainly because of its activity from the last 22 years.
