Experimentation with Fractalius, a Photoshop Plugin. This application can create some amazing surreal images.
This image is of a eucalyptus forest in the Blue Mountains, Australia. The trees, affectionately referred to as "gum trees" have a white bark and can provide a ghostly appearance anyways (in fact, there is a tree called Ghost Gum). Using this plugin, that effect is accentuated.
Hope you like it.