Poás Volcano National Park, in Spanish Parque Nacional Volcán Poás, is a National Park in Costa Rica that covers an area of approximately 65 square kilometres (16,000 acres); the summit is 2,700 metres (8,900 ft). One of the attractive features about Poás is that you can get all the way to the edge of the crater. The volcano is located in the Central Volcanic Conservation Area located in the Alajuela Province near the Pacific coast of Costa Rica, which encompasses the area around the Poás Volcano. The main crater is 290 metres (950 ft) deep and is quite active with frequent small geyser and lava eruptions, however the last major eruptions were during 1952-54. Two more craters make up parts of the park, the extinct Von Frantzuis crater and the Botos crater. Botos is a beautiful cold, green water crater lake with a diameter of 370 metres (1,200 ft). The Botos crater has not erupted for about 7,500 years. Well-marked trails will take you to see the two inactive craters. The park is frequently closed to visitors because of sulphuric gas emissions. Over the last decade there have been a number of indications that the volcano is slowly building up towards a new eruption.