Detroit is a colorful, gritty, oft-misunderstood city.
If you get a chance to visit, or if you're connecting to somewhere else, there's one colorful aspect of the city that is a can't miss: the rainbow tunnel at DTW.
The tunnel connects Concourse A with Concourse B/C in the McNamara Terminal. Along the entire expanse, changing light patterns in the glass panels are timed to equally psychedelic music.
It's a bizarre but great tribute to the city and a fun diversion for travelers. Sometimes when I am traveling through, I traverse the tunnel whether I need to or not. It never fails to put a smile on my face.