Gero Onsen is one of Japan’s most famous hot spring towns, long praised for its smooth, alkaline waters. Known as a place of healing and relaxation, the town developed at a crossroads of historic travel routes and remains a symbol of Japanese onsen culture and hospitality.

The Gero Hot Spring Museum explains how hot springs are formed underground and why water quality differs across Japan. Through exhibits and models, visitors learn about geothermal science, regional spring types, and the cultural role of bathing in Japanese life.

Onsenji Temple overlooks Gero Onsen and is closely linked to the town’s hot spring legends. According to tradition, a sacred white heron revealed the healing waters to people. The temple reflects the deep connection between hot springs, faith, and gratitude toward nature.