Established on January 25, 1971 National Park is 5,600 ha, was expanded in 1993 to encluir Cerro Congo, for a total of 6 .. 506 has. Poas Volcano National Park, and received the largest influx of visitors throughout the country, is also an important energy source, product water and geothermal.At 2,708 meters above sea level, the spectacle of its main crater, Botos Lagoon, nature trails and great biodiversity make it unique. Surrounded by forests where epiphytes abound and giant ferns, and the presence of poor umbrellas (Gunnera insignis).
Poás Volcano eruptions are known at least since 1747 when the Spanish governor Juan Gemir reported on its activities. In its long history stand out other dates, as recorded by Mr. Andrew Oersted in 1834, which warns of underground detonations and ash thrown up by the volcano 30 miles away, and 25 January 1910, considered the biggest eruption Mud, gas blocks and ash.The last eruptive period, with emission of large clouds of ash and incandescent rock, accompanied by subterranean noises, forming his current estruptura occurred between 1952 to 1954. In the year of 1994 was recorded last eruption which consisted in increasing the activity of the vents with desgassificación process with a high content of sulfuric acid.
FLORA AND FAUNA
The life zone are represented Montano Rain Forest and Lower Montane Wet Forest. There are 4 main habitats. The cloud forest that surrounds the Botos Lagoon and the back of Potrero Grande papayillo predominate, orange blossom bush, oak, and 2 species of ciprecillos. On the slopes of the Caribbean side, the forests are higher and very rich moist palms, tree ferns and epiphytes. The dwarf or stunted forest is observed along the path between the main crater and Botos Lagoon: the predominant species are orange blossom mote, and copey tucuico. The myrtle dominated crater near the gazebo and the first stretch of the nature trail to Laguna Botos. Areas with sparse vegetation around the crater, where species such as cow's tongue fern.Although the fauna in general is scarce, the birdlife is abundant. We have identified 79 species of birds, including escachero, hummingbird, quetzal, black guan, comemaíz, Green Aracari, bounding and bounding of patigrande yellow thighs. The mammals are not abundant in the highlands of the park, however, are shrews, weasels, rabbits, squirrels, coyotes, frogs, toads, salamanders, snakes and insects.