阿蘇山 is a large active volcano located in 熊本県, Japan. It is part of the 阿蘇火山群 and features one of the world's largest volcanic calderas, measuring about 25 kilometers in diameter. The area is known for its stunning landscapes, hot springs, and diverse wildlife. The volcano has several peaks, with 中岳 being the most active. Visitors can explore the surrounding national park, which offers hiking trails and breathtaking views. 阿蘇山 is also significant for its cultural heritage, with nearby shrines and traditional farms that showcase the region's history and agriculture.