The most characteristic feature of this
zone is the impressive and majestic Arenal Volcano, an almost
perfect active cone 1,633 meters high, whose regular eruptions offer one
of the most extraordinary and awe inspiring natural sights in Costa Rica.
There are four important types of vegetation
in the zone and the Arenal National Park, the perennial wet and very wet forests that cover about
47% of the area. There's also cloud forest and riverine woodlands, where
several endemic species can be found, like the brunelia costaricensis and
the epiphytic pineapple.