Minecraft nether?

I like to play Minecraft, but I was really concerned with the underworld, Nether.

My question is, do you know what the secret full place over the Nether is. I teleported to the Nether and built myself very high, or I flew up and removed the blocks above me until I discovered a new place. The floor consisted of "bedrock" (stone) and the Hinmel was purple walked around a bit and was very astonished when the color in the sky changed after a while. Once it was red and suddenly light blue, I was a little scared when I heard such strange voices. Does anyone know what this place is all about 😅

The game is not intended to get there. Even if this is possible in survival mode. So no great attention is paid to this during programming.

It's just like in the Overworld if you build yourself down. Nothing comes anymore.