Rainbow Eucalyptus trees in Maui, Hawaii. The phenomenon is caused by patches of bark peeling off at various times and the colors are indicators of age. A newly shed outer bark reveals bright greens which darken over time into blues and purples and then orange and red tones. As a side note, the bark peels naturally. No one has pulled the bark off to reveal the colors.
Arborsculpture is the teasing of trees into useful or attractive shapes. Trees are planted and grown in such a way that it took an amazing shape which is not only difficult but also time consuming. Stems of trees are gradually shaped in its young stage, while the tree is growing to form the desired shape. It is a very lengthy process but amazing. More about the art of three shaping here: http://www.permaculture.co.uk/articles/art-tree-shaping Save the Trees, Use Parax Stone Paper