The Aso Caldera, which is one of the largest in the world (18km east-to-west, 25km north-to-south, total area: 350 km2), is home to the Five Peaks of Aso: Takadake (1,592), Nekodake (1,433m), Nakadake (1,506m), Eboshidake (1,337m) and Kishimadake (1,321).
The entire area is referred to as Mt. Aso, and the cluster of volcanic mountains features a wide range of unique flora and landforms. Nakadake is still an active volcano, and it is one of the few active volcanoes in the world that you can view from nearby. Depending on the weather, you can see the massive emerald green caldera lake (Diameter: 600m, Depth: 130m, Circumference: 4km) and formidable volcanic plumes.