Mägo de Oz ("Wizard of Oz", also known as simply Mägo) is a Folk rock and Heavy metal band from Spain. The band is well known for the strong Celtic feel to their music, strengthened through their usage of a violinist and flautist. The name for this band was chosen, according to founding member Txus, because "Life is a yellow brick road on which we walk in the company of others, searching for our dreams."
Full wikiMägo is one of my favorite bands, and probably most of you aren't going to understand the lyrics (because they sing in Spanish only), but I thought that it was still worth sharing.
I can't link to their Myspace, because for some reason they don't seem to have one.