Interactive Maps are Cool

Every once in a while something comes along that is both fun and informative that strives to educate about metal and it's subgenres. I've posted org charts and such before but nothing like this. This link will take you to a page that covers all regions of the world based on decade and genre and if you click on any of the bands listed it will play selected tracks from them. You can easily waste away looking at this thing.
Ever wanted to know what the fuck crust punk or neoclassical black metal is? this map will show you. Here is the link to begin your journey.