Yudono-san Shrine 湯殿山神社
It has no building: the deity is a warm rock from which water springs, and it cannot be photographed.
The third and most secret of the Dewa Sanzan shrines, in the municipality of Tsuruoka, a destination of the ‘rebirth’ pilgrimage together with Haguro-san and Gassan.
Yamagata
湯殿山本宮