A photo of my recent PHL-FRA trip - these are the bright lights of Manchester from 39,000' over Bury looking south. Manchester airport are the bright lights to the upper right, on the edge of Manchester. The blury lights at the top middle is the Birmingham conurbation, and between the two is Stoke on Trent. Airports tend to be bright around the terminal, but otherwise dark, particularly in urban/suburban areas - I used to 'find' BWI purely by it being a black-hole amongst the lights of the surrounding area!
