... Volcan Poas National Park ...
by Infocostarica Staff

Botos Lagoon is a filled-up crater in the Parque Nacional Volcan Poas. Its deep blue waters contrast with the dense tropical forest that surround it, making it the perfect spot for the stereotypical Indian sacrifice- throwing a young maiden into the mouth of a crater or a lagoon. Volcan Poas is one of the most visited volcanoes in Costa Rica, because of its proximity to San Jose and because of the luxuriant forest that surrounds the two craters. The park measures 5600 hectares, and this basaltic volcano stands at an altitude of 2708 meters (8,200 feet) above sea level.



One of the craters measures 1.5 kilometers in diameter (0.9 miles) and is 300 meters deep (900 feet). At the bottom of this prehistoric-looking hole, there is a medium sized lagoon, that spews boiling sulphurous gases. The other crater is the one mentioned above, called Botos Lagoon, which unlike the other lake, contains cold water that connects to the Rio Angel, and later to the large Rio Sarapiqui. The volcano has had a long history of eruptions, going back as much as 11 million years ! On January 25, 1910, the volcano spewed out 640,000 tons of ash, and in the period of 1952-1954, it bombarded nearby areas with ash and rocks. Since then, the Poas has maintained a low profile, but as recently as 1989, the park was closed because of dangerous sulphurous gas emissions. Its geyser-like eruptions of muddy water and steam, have given it the reputation as the world’s largest geyser.


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