Take the 15-minute ferry ride from Kagoshima and Sakurajima Yogan Nagisa Park. From here you can admire the smoky peak of Sakurajima volcano from several observation points, including Yunohira. Or take a dip into Magma Onsen, one of several hot springs where you can refresh yourself before the return trip.
Step back in time at Sengan-en, a sprawling samurai estate originally built in the 17th century that offers breathtaking garden views of the bay and Sakurajima puffing in the distance. The villa here was built out of Yakushima cedar trees over 1,000 years old; it's perfect place to try traditional Japanese green tea and chocolate sweets.