Poás Volcano is an active stratovolcano located in Costa Rica. It is known for its large crater, which measures about 1.5 kilometers wide and contains a sulfuric acid lake. The volcano is part of the Poás Volcano National Park, a popular destination for tourists and nature enthusiasts. The last major eruption occurred in 2017, but the volcano has been active for thousands of years. Visitors can enjoy hiking trails and stunning views of the crater, as well as diverse flora and fauna in the surrounding area. The park is an important site for conservation and research.