"Earth’s Most Stunning Natural Fractal Patterns" (Wired Science)
http://www.wired.com/wiredscience/2010/09/fractal-patterns-in-nature/?pid=163
"Fractal Geometry" (Yale University: Michael Frame, Benoit Mandelbrot (1924-2010), and Nial Neger)
http://classes.yale.edu/fractals/
"Captivating Fractals Found In Nature" (Web Ecoist)
http://webecoist.com/2008/09/07/17-amazing-examples-of-fractals-in-nature/
"Fractals Found On Earth" (The Fractal Foundation):
http://fractalfoundation.org/2009/02/fractals-on-the-earth/
Lena River Delta (image from NASA)
Aleutian Vortex (image from AskNature.Org)
If that's still not enough natural fractals for you, look here.