Mt. Irazu is found in Costa Rica and is part of the Cordillera Central. To the locals it is known as Volcan Irazu. Mt. Irazu is the only place in America where you can see both the Atlantic and Pacific oceans at the same time. Its name is derived from a word meaning "thunder and earthquake mountain". Cartago and San Jose are the closest cities. Mt. Irazu is the highest active volcano and also the largest one in Costa Rica at 11,260ft. or 3,402meters. Irazu is an irregular sub conical shaped stratovolcano (composite volcano). It has several craters, the biggest 900ft. or 275meters deep. Some craters contain mineral rich lakes, colored green due to rainfall dissolving minerals on the slopes of the craters. Costa Rica is located where the Cocos plate is subducting under the Caribbean plate. Mt. Irazu is at a subduction boundary.