Solaniwa Onsen is a hot-spring theme park in Osaka Bay Tower at Bentencho, where guests wander in yukata. On the fifth floor, a weakly alkaline hot spring from 1,000 m fills nine baths, including a free-flowing open-air source bath and an infinity bath overlooking a large Japanese garden. The Finnish-style dry sauna has auto-löyly, and a cold bath stands next to it. Open 11:00 to 23:00, with a morning bath from 6:00 to 9:30; adult entry runs from ¥2,310 to ¥3,630 by date.