One of the temples of the Chugoku 33 Kannon Temple Pilgrimage. It's a short distance from Handayama Botanical Garden.
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岡山市半田山植物園
A botanical garden filled with various types of flowers. It's particularly beautiful during the spring cherry blossom season; however, one can easily enjoy this garden anytime of the year. It's a 10-minute walk from Hokaiin Station on the JR Tsuyama Line. There are also buses from JR Okayama Station.
アニモ・ミュージアム
岡山県総合グラウンド
The Multipurpose Grounds contain a wide variety of sports facilities, including a pool (only open in July and August), tennis courts, a baseball field, gymnasium, and track and field area. It is also home to City Light Stadium where the J-League soccer team Fagiano Okayama plays. Other local teams and university teams also use the facilities. If you're interested in watching sports, check the schedule of events. There is also a small Sports Museum near the stadium. The phone number listed here is for the stadium however, each facility has its own phone number. If you need to contact a specific facility, check the website for its number.
吉備路文学館
Displays of original works and transcripts from famous authors from the Okayama area. It helps to have Japanese reading ability and an interest in Japanese literature, of course. It's just north of the city center, a couple blocks east of the Nishi-gawa Canal.
夢二郷土美術館
A museum featuring the works of Okayama-born artist Yumeji Takehisa, a well-known artist throughout Japan. He is best known for producing paintings and sketches of beautiful women, and many such works are on display in the museum.
岡山県立博物館
An excellent museum with a variety of artifacts excavated from various areas throughout Okayama Prefecture from prehistoric artifacts to the Edo and Meiji Periods. Some highlights of the museum are the famous Bizen swords and Bizen pottery. It's just outside the main entrance to Korakuen, so it's well worth a stop.