http://everynoise.com/engenremap.html
A friend told me about this website at work today. Basically the page opens with every genre and sub genre you could possibly imagine. You can click a sub genre and the it brings up a group of artists that are similar grouped together. Then you can delve further into it. Playing 10 second or longer clips.
On my Samsung s7 its very slow but on a decent pc or laptop it would be better as you need to zoom in and out a little and the phones small screen is a hindrance.
Its loosely based around Spotify algorithms to joins all the dots.
I can see myself losing days on this website.
Hope someone finds it worthwhile