A few days ago I was on pointless.com because I was searching for a website which was on there but no longer is but I came across one of my favorite websites, which I forgot about, called nested which is a crazy, amazing and very interesting website which I came across years ago. Its pretty much a fractal as you can guess by the name "nested", you open the first "universe" and you get all the way down to quarks and electrons which contain multiverses so you always end up in universes again, I'm pretty sure it's actually a theory that everything contains a universe which I need to look into for my research. Whilst going through the website you come across different types of multiverses including special ones which are doughnut, lasagna, bacon and shark multiverses. I found out there is also a wiki which goes through all the stuff on the website and I also joined the discord server of the creator of nested and found out there apparently making nested 2 which I can't wait for if true! Anyway I seriously suggest you check this website out!