I like to wander around after dark. I love the lights of the city, and it looks like Chicago has a most impressive night skyline. What are the best areas to go after dark, if one is not looking to go to a bar or club? I don't necessarily have to go to a destination but just wander around looking at the sights.

I know I will want to see Millennium Park at night, How is the riverfront at that time? And would I be better staying in the loop, closer to Millenium park, or the weest side of near north?