Would it be the way leaves change colour; the spider's web; the mighty Redwoods (giant sequoia's); or how alot of trees seem to reach out to eachother along the avenues or how some are entwined?

The two favourites of mine are fractual geometry in nature and the crop circles (Yeh....I notice they're both got shapes! lol).

Anyone see what common denominator stands out when they pick their favourites?