[2024 Semboku Attraction] Travel Guide for Oyunuma marsh (Updated Sep)

Oyunuma Onsen pond

#helloautumn The valley behind the ryokan is volcanically active and can be viewed from a very attractive network of walking trails. A two kilometer long circular route takes you past all the major sights, including many bubbling mud ponds, hissing sulfur vents and hot water streams, as well as Oyunuma Pond, a large body of hot water and mud with numerous miniature mud volcanoes.