Sediment that collected in a caldera formed some 3 million years ago later collapsed due to landslides to create the basin we find here today. Mt. Atago, which stands in the center, has a ski slope. The gentle slopes where landslides once occurred are now used for terraced rice farming.
- Postal Code
- Tando, Shin-onsen Town, Mikata County, Hyogo Prefecture
- Shinonsen Town San'in Kaigan Geopark Center 0796-82-5222