With close to six million views on YouTube, this video doesn't fall into the "undiscovered" category. Nevertheless, it falls into the crazy-amazing-miniature-machine category.
This incredibly small motor is the work of a Spanish engineer named Patelo. 1200 hours went into designing and fabricating one of the world's smallest V12 engines. The video shows the assembly process and culminates in the motor running on compressed air. This is some very fine miniature machining, indeed.
It's Monday; let this inspire you to make all that you can of the coming week. Enjoy!
[ Thanks John! ]