Ikaho onsen, Japan

is one of Gunma Prefecture‘s most renowned onsen. While not as famous as nearbyKusatsu, Ikaho’s baths are nevertheless a unique experience due to the unusually high iron content of their hot spring water.
The source of the hot spring is found about 500 meters past the top of the stone steps. It can be viewed through a clear casing near the public outdoor bath (Ikaho Rotemburo). Ikaho has twopublic hot spring bath houses

Ikaho RotemburoBeyond the top of the stone steps past Kajika Bridge
Hours: 9:00 to 19:00 (April to September), 10:00 to 18:00 (October to March)
Closed: 1st and 3rd Thursdays of each month (except for holidays)
Admission: 450 yen
The Ikaho Rotemburo is the town’s large public outdoor bath (rotemburo) which was built just a few steps from one of the mainhot spring sources in town. The rotemburo is gender segregated, and each side has both hot and warm baths, though neither is especially hot.

Ishidan no Yu

This public onsen is located near the bottom of the steps, and features modest sized, gender segregated indoor baths filled with Ikaho’s signature rusty brown hot spring water. The walkway leading up to the entrance is paved with stones that were salvaged from renovation work done to the stone steps nearby.Lower portion of the stone steps
Hours: 9:00 to 21:00 (April to October), 9:00 to 20:30 (November to March)
Closed: 2nd and 4th Tuesdays of each month (except for holidays)
Admission: 410 yen