On the south side of the lake, these are in fact two canyons, both several hundred meters long, densely carpeted with thick, green moss. Free entry and well worth a visit.
Sources and licences
Guide text adapted from the Wikivoyage article "Shikotsu-Toya National Park" by its contributors, available under CC BY-SA 4.0. Read on Wikivoyage · Contributors · CC BY-SA 4.0
