(i.e.: Three dimensional photographs taken from a kite.)
The colour change is due to the rapidly-setting sun. The perspective difference is largely due to an altitude change, rather than horizontal position - but the shift was sufficient to generate the stereo effect.
Stop Press! Another Kite Aerial Sterograph (newer... better!) can be found on the fifth KAP index.
Not used to viewing parallel pair stereographs? More information can be found here!.
Alternatively, you may like to try viewing this as an anaglyph (red-blue) image.
Help on viewing anaglyphs can also be be found here.
© PHS