Trees, nature's condos for the little guys, are not just a pretty picture. Squirrels, birds, and bugs count on them for a place to live. (I know the lens is about trees and not art. But I love that face-in-the-trees illusion artwork.
The multi-coloured streaks on the Rainbow Eucalyptus trunk comes from patches of outer bark that are shed annually at different times, showing the bright-green inner bark, which darkens and matures to give blue, purple, orange and then maroon tones.