the Poas volcano or in Spanish, Volcan Poas is an
active stratovolcano in central Costa Rica that has erupted 39 times
since 1828, with two large crater lakes near the top. The lake that
lies on the northern side is called Laguna Caliente because it is
the world's most acidic lake and doesn't support any type of life.
The southern lake, or Lake Botos lies within an inactive crater that
is believed to have last erupted in 7500 BC., and is quite cold and
very clear, surrounded by a cloud forest that sits in the Poas
Volcano National Park. In January, 2009, a 6.1 magnitude earthquake
would occur in the epicenter that would kill forty people and affect
Fraijanes, Cinchona and Vara Blanca, the Central valley of the
nation and the capital, San Jose. There were other activities in the
same year that involved minor phreatic eruptions and landslides in
the northern active crater and often there are geyser like ejections
of lake water.