The artificial Kanda river

The original route of the Kanda river was different

from the current flow.

In the past, people living in old Tokyo(Edo) 

were suffering from critical floods of

the river. Therefore, the government at that time

took an action to control flood.

They decided to do a great thing, which was

changing the route of the Kanda river.

they built the by-pass route of it, and it was

needed making new route through a hill in old Tokyo.

Nowadays, the current Kanda river has been taken

the same route at that time.

I'd like to watch the trace-mark penetrating the hill. 

The hill. the original route of the Kanda didn't flow along it. 

The chuo line can be seen beside it. 

The river looks like a steep walled valley, which is artificial.
It was dredged now.

I could see a dredging ship.

A different angle.

From the view point of the opposite.
We can feel easily the river was made artificially.