The Irazu Volcano is one of the seven active volcano in Costa Rica, located in the Cordillera Central close to the city of Cartago. Although it has erupted frequently, at least 23 times since 1723, its most famous eruption began in 1963 and continued until 1965. The US President John F. Kennedy was visiting Costa Rica when the volcano erupted showering with a immense cloud of ash the capital San Jose and much of the central highlands of Costa Rica. However, since then the volcano has remained dormant, with the exception of a small phreatic eruption that happened on 1994, and that killed vegetation and some small animals with acid rain. Irazu Volcano has several craters, such as the green Crater Lake called Diego de la Haya. It is the highest active volcano in Costa Rica. In very clear days, it is possible to see both the Atlantic and the Pacific Oceans; however, this is a very rare phenomenon due to the normal weather conditions of the country.