Nightflight above the north-western Ruhr area.
Enjoy a fantastic view at the area with the highest density of population, here in Germany. About 5.1 millionen people are living in about 23 bigger and smaller cities distributed over 4435 square-kilometres.
One city borders so close to the next one, that it is often hard to distinguish where the borders are, or to say if you’re still in this one or be already in the other one.
Especially in the northern part of the Ruhr-area the cities seem be only one huge city.