Poás Volcano is an active stratovolcano located just outside of San José. It is known for its active crater that produces smoke, gas, and occasional eruptions, which are closely monitored by scientists. The crater is over a mile wide and 984 feet deep, making it one of the largest active craters in the world. The Poás Volcano National Park features a variety of hiking trails that lead to the crater and offer stunning views of the surrounding landscape, including waterfalls, forests, and the Central Valley. You can also explore the park's diverse flora and fauna, including the Poás Volcano butterfly, which is found only in this region. Due to its high altitude and frequent eruptions, the park has strict safety measures in place. You are required to wear protective gear, and the park may be closed at times due to volcanic activity. However, for those who are able to visit, Poás Volcano offers a truly unique and unforgettable experience.