The natsumikan is a citrus fruit that's grown in many local gardens, and squeezed into a tasty juice. At Yuzuya Honten, you can buy natsumikan and other local fruits whole, enjoy them as ice cream, or lend a hand at turning them into juice or marmalade. It's on a peninsula directly north of the city — either take a cab or walk west from JR Koshigahama Station.
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笠山
It is the smallest active volcano in East Asia, and offers panoramic views of the Sea of Japan. Look for the lovely camellia flowers during February and March.
明神池
A small pond at the foot of the mountain, which houses saltwater fish.
恵美須ヶ鼻造船所跡
The shogunate had banned shipbuilding in the provinces to avoid uprisings however, as outsiders took more interest in Japan, the ban was lifted in 1853 and within a few years the Choshu Domain began building warships with new Western technology from Russia and the Netherlands. The ruins of the shipyard were registered as part of Hagi's World Heritage listing.
萩反射炉 Hansharo
This massive furnace was built in 1858 for the production of modern weapons, but rarely used. It's partially in ruins today, but still an impressive sight.