Aso is a huge caldera of an ancient supervolcano that, as a result of its massive past super-eruptions collapsed onto itself, leaving an area of indented ground with a mountain range at its center which now holds an active crater. I rented a car and explored the area for 2 days.
My first visit to Saga prefecture. I went to see the Karatsu Kunchi festival (in Karatsu) and Saga International Balloon Fiesta (in Saga) which is a world class hot air balloon competition. This is the account of my first, unsuccessful attempt to catch the Saga balloons.