Facial Expresion Anatomy - Artnatomy

I found this wonderful website, a site you can't miss if you are serious about drawing faces. Artnatomia is a spanish website developed by Fine Arts students and figure drawing artists. The creator of the site is Victoria Contreras Flores and the site allows to locate the head muscles that are involved in facial expressions. It is made in flash, and it is completely interactive,with detailed descriptions. Jewels like this are found in websites form all countries, but don't worry it has an english translation. ;)