Kameiwa no dokutsu (亀岩の洞窟) is one of the popular scenery spots in Chiba Prefecture. It is the small waterfalls located in the tunnel. There is a rock looks like a turtle. Kameiwa literary means turtle rock. This tunnel is the artificial tunnel made in 1660.

Tourist Info.
There are parking and restroom.
There are a gift shop and a restaurant.

Access
0. at Chiba Station.
1. use a local bus to Furusato Bussankan.
2. walk