what it is: map of metal
where i found it: some interview with some musician
In reading some interview with some musician I was referred to this, the Map of Metal, which has a giant landscape detailing all kinds of types of metal and related genres, with many tracks from each pocket for the hearing. It takes a while and you have to drag the map around, but a little investigation will take you to states such as Blackened Crust, countries like Greek Black Metal and faraway lands such as Funeral Doom (and, unfortunately, Rap Metal). Enjoy.