On the way there we saw a lot more food carts/vans/tailers, and this one was really cool:
It was powered by vegetable oil!
When we were almost at Powell's we saw this:
There were a lot of cool public artwork in Portland, and this was one of them. I didn't quite know what it was, but it looked like a very well-balanced brush with a heavy "core" underneath it.
Brian demonstrating how you can move the "brush."
And across the street was Powell's Books!