My favorite feature of Detroit Airport (DTW) is the long hallway between Concourse A and Concourses B/C.
It is really a tunnel. The walls have the appearance of brushed aluminum. There are moving sidewalks on either side of the tunnel. The best part…. the walls change color! Blue. Green. Pink. Red. The music pumped into the tunnel is surreal new age-y…. I stood there for twenty minutes just watching. I took some pictures and video with my cell phone.