The best views often come from up high. Kagoshima Airport Observation Tower is a popular spot to admire the surrounding landscape and snap some great shots.
When you've spent a bit of time at this scenic viewpoint in Kirishima, why not check out Myoken Hot Springs, Kagoshima Shrine, and Barrel Valley Praha&Gen? They're not very far from Kagoshima Airport Observation Tower and also popular with many tourists.