Skylining is a photo technique utilizing a "contra light" of a dimly lit sky, usually at sunset or sunrise, with a completely black foreground, forming an interesting artificial horizon or a "skyline".
This is a reflection of the San Francisco International Airport (IATA
code: SFO) in the windows of an office building. A city of San Bruno
can be seen on the left, with the big United Air Lines maintenance
hangar, situated in the middle of the reflection.
The Columbia River Gorge, looking upstream from Chanticleer
Point - the first viewpoint on the Historic Columbia River Highway when traveling east, away from Portland, OR.