This is the columnar joints in Tenninkyou Valley. Souunkyou Valley has more and higher columnar joints but this valley has a little bit different taste.
As Route 39 goes through Souunkyou Valley, the exposure is higher than this valley but the road to this valley ends at the hot spring area. So the atmosphere is more attractive and mysterious.
I found a large snake beside the path to the waterfall 40 years ago when I visited and stayed there with my past father. I shouted "Snake is there !" and my father was so surprised that he jumped up one meter high and the snake crawled away.