Photo: Brian Adler (BrianAdler), Public domain via Wikimedia Commons
A great place for a day trip from Fukushima. The information center is just across the street, open all year round between 09:00 and 18:00 (+81 24-542-4241). The staff can speak English and will equip you with a useful English booklet of the onsen and help you booking a day or overnight visit to one of the bath houses. Also they offer tours through the spa town and its surroundings. While strolling through the streets, you can enjoy three foot baths (open throughout the year, free of charge)..
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福島県立美術館, fukushima-kenritsu bijutsukan
Small museum mostly with local art, though it does have some national and international exhibits as well (including a handful of prized Impressionist and Pointillist paintings). Phones and cameras are not permitted, except with an armband for hand-written translation (camera translation is not permitted). The attached curry restaurant and cafe, and library, are both popular with locals.
岩谷観音
Iwaya-Kannon has sixty Buddhas carved into the rock face of Mount Shinobu (信夫山) and offers a decent place to take a look down at the city.
福島県文化センター, fukushima-ken bunka-sentā
信夫山公園
Hilly park with three observation decks overlooking the city, as well as the Neko Inari Shrine, Fukushima-ken Gokoku Shrine and Henshoin Temple
福島競馬場, Fukushima keibajō
If you feel like betting on horses then this is the place to go in Fukushima. Live races only happen during certain times of the year (usually April, July and November), but video races are available on weekends year-round.
小鳥の森 meaning "forest of little birds"
It's a steep walk up a small mountain. The trails at the top are short and quiet. It is very peaceful but not so special except for bird watchers.