The Fibbonacci Cabinet was a little woodworking / art project that I worked on for my girlfriend, Dayna, back in college.
The Fibbonacci sequence is a famous pattern in mathematics that details a lot of the patterns we see in nature. After building the cabinet for her kitchen (since her and her roommate lacked one), I used a Dremel to painstakingly etch out the resulting spiral of properly calculated Fibbonacci geometry.