Aso volcano, located in Kumamoto Prefecture, Japan, is one of the world's largest active volcanoes. It features a massive caldera, approximately 25 kilometers in diameter, formed by multiple eruptions over thousands of years. The volcano has several peaks, with Mount Nakadake being the most active, frequently emitting smoke and ash. The Aso region is known for its rich biodiversity and unique landscapes, attracting tourists and researchers alike. The area is also home to the Aso Kuju National Park, which offers hiking trails and stunning views of the volcanic terrain. Aso's geothermal activity contributes to the local hot springs, enhancing its appeal as a travel destination.