Context Free, 82 6565 57 characters
startshape T
rule T{SQUARE{s 19*[y 10}2*1]SQUARE[]2*{f 90}T{s .75x-1.5y 875y r8r 25}}startshape T
See: http://www.contextfreeart.org/gallery/view.php?id=3384
Golf'd further with help from Context Free Art userusers minimaleye, MtnViewJohn, and kipling.