Found 37 Km North of the city of Alajuela, this 5,600
hectare park was formed in 1971. It centers on Poas
Volcano, one of the most spectacular in the country.
This volcano is considered to be the active volcano
with largest crater in the world.
eruptive history includes an eruption in 1910 that
blew clouds of hot ash over 8,000 meters into the
sky. In its last eruptive period (1952-1954)it threw
off clouds of ash and incandescent rocks. between
these perioods it is not necessarily quescent, often
coughing out some ash or steam.
About 60% of this park is covered with primary forest.
This is mixed with patches of regenerating secondary
forest, slowly replacing forest destroyed by eruptions
or, in some cases, damage by man. Some areas near
the crater are covered by that weirdly beautiful dwarfed
forest seen in these situations, elfin forest.
the mammals seen there are the wild goat, 2 species
of monkeys, the armadillo, tepescuinte (giant jungle
rodent), the tapir and several felines. The crater
often attracts large flies due to sulfurous gases
similar to some given off by the decomposition of