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.
The Tunnel was made about 1660 as the artificial canal to short cut to create more rice fields. This method is called Kawamawashi, the detouring the river.
The rock inside of the tunnel looks like a turtle.