Saidaiji Kannon-in is a large historic temple to the East of Okayama City. It is the first temple on the Chugoku 33 Kannon Pilgrimage, though I visited it on the second day of my walk along that pilgrimage as temple 2 is further East and it made logical sense.
When I visited it was very quiet, which it is for most of the year, but in late February it is filled with thousands and thousands of near-naked men taking part in the famous Hadaka Festival, commonly known as the Naked Man Festival.
For more details about the festival and also about the legend associated with the temples founding, please see a piece I wrote on another site.
Some of the buildings, like the 17th Century Pagoda, and some of the statuary, like the large Kannon, are quite interesting, and the street leading to the temple from the nearest train station has a few old buildings, but outside of February things here are pretty quiet.....