Niimi, city of nature
"limestone city"
Niimi was small city in Okayama prefecture. It was blessed with beautiful nature, limestone caves.
There are two famous caves here: Maki cave and Ikura cave.
If you want to see both of the cave using public transportation such as bus or train, I suggest you to go to Maki cave first, then Ikura cave. Because there are not so many bus go to Maki cave, but Ikura cave is easier to be reach by bus or train.

Ikura cave
Maki cave