Here is a pretty cool site that features a map of heavy metal – it’s called “Map of Metal” – that includes explanations and examples of all the different sub-genres. Like Dante Alighieri in hell, you can travel to every major movement in heavy metal history.
As you tour the metal map, you can listen to several landmark tracks in each location. For example, in the Thrash section you get Metallica’s “Seek and Destroy” and in Neo-Classical you’ll find Yngwie Malmsteen.
Black Metal is broken down into a plethora of sub-sub-genres such as Greek Black Metal, Depressive, and the Second Wave of Black Metal. It’s a fascinating journey and site to stroll around. Check it out at mapofmetal.com.