I visited the site of the Shimotsui Electric Railway line in Okayama, which was discontinued in 1991.
Although the line was completely discontinued in 1991, a section of the line was discontinued in 1972, so you can enjoy two different atmospheres at the same time.
In addition, there is a place near Shimotsui Station where you can see Mt. Washu and the Seto-ohashi Bridge, so it is worth visiting just for these spots.
Also, I never got bored of cycling there because the atmosphere of the surrounding area changes so much.
I recommend this spot.