When I'm on the train, often pass this river. I saw that it has a nice walking path around it, so I rode to Asakusabashi and walked to it. I'm glad I did because it was a pretty nice view out there.
The river is the Sumidagawa. I stood out there enjoying the sights, sun, and air for about half an hour, probably (even though I hadn't eaten yet).
Definitely a part of Tokyo I like.