Minecraft has the achivement: Advenuring Time. There you have to discover all the biomes.
My question: Is there a list somewhere in the Minecraft folder where all biomes that have already been discovered are listed? And where is he?
I only saw that the YouTuber BastiGHG did something like that.
You can go to the "advancements" folder in the world and then you have to open the file with your UUID and under "minecraft: adventure / adventuring_time" you will find all the biomes that you have already visited.