Many cities look better at night when the lights highlight what you are supposed to see and the shadows conceal neglect and decay. Portland isn't one of those cities; it is clean, well maintained and very nice to look at by day. However at night it looks so much more like a city than what it really is, a large town.
I posted another panorama a couple days ago and this one was taken further down the river. On the left is the Morrison Bridge and on the right is the Burnside Bridge. I like that you can also see the Fremont Bridge under the center span of the Burnside. If you know what you're looking for you can also see parts of the Steel Bridge and the Hawthorne Bridge in the distance.
Canon 1D Mark IV, Canon 16-35/f2.8L Mark II
35mm, f8, 3.2 sec @ 320 ISO