Great shot. Where is this observatory?
The location is at Jungfrau, a mountain near Interlaken, Switzerland. Altitude is around 4000 meters. You get there by an insanely expensive cog railway, $170. At the top its very cold, windy and icy. Its a major tourist attraction and part of my motivation was to make a frequently photographed landmark look a bit different.
The idea behind the blue, and apparently it is not everyone's idea of perfect, was to make the shot look more like night. It was taken at high noon in the brightest light imaginable. Perhaps the moral of the story is just because it is easy to do something in digital, it might not make sense.
I am going to take another look at it. If I decide to change it, there may be a momentary outage, so to speak.
Anyway, thanks for making me think about the tone issue.