It is said that Ōkuninushi, the kami who created the land and Sukunahikona, the kami who assisted Ōkuninushi to "form of the land", took a trip from Izumo to Dōgo (in today's Matsuyama). Sukunahikona was ill, but after taking a bath in a local hot spring, was healed. Then, the kami danced with joy, and a footprint remained imprinted in stone.
That stone is known as "Tama no ishi", and it is exhibited at the Dōgo Onsen, which it is also believed that it was built by the two kami.
EXIF info:
Nikon Df
Lens: 14mm F/2.8D
Focal Length: 14mm
Aperture: F/3.5
Shutter Speed: 1/60s
ISO Sensitivity: ISO 6400