Bove Valley is one of the most important naturalistic areas of the
Park. It is an enormous basin situated on the eastern slope of the
volcano, which, according to some theories, is the result of the
collapse of the original crater complex. The basin is 7 km long and 5
km wide, with walls which reach the 1,000 meters of height.
In the night between the 13th and 14th of December 1991, at about 2,400
meters of height, there was an eruption which gave birth to a lava flow
which lasted until the spring of 1993.