This Web site is full of information. I spent about an hour browsing the links and looking at it from a teaching perspective as well as a practical perspective. I found that there was a mathematical explanation for a graceful spiral. Who knew! Yes, I'm new to Fibonacci and mathematical theories, but what I found in the art and architecture links opened up a new world to me. As a newbee, the puzzles were a bit over my head, as were some of the explanations. But, new to Fibonacci as I am, the concept clicked when I could link a string of numbers to an aesthetic in art. I recommend checking out Brian Knott's ray tracing in the art section... and in the architecture section, the Cal Poly Engineering Plaza is stunning.
Unfortunately I found many broken or outdated links which was a bit frustrating. However, I still recommend this site for the novice or advanced mathematician as well as those who teach art or math. This is a very complete Web site.