World with huge trial chamber and huge deep dark

The pic doesn’t do justice.

I was just playing Minecraft on a new world with my 9 y/o after not playing for years really and stumbled across this huge cave with deep dark immediately after spawning nearby (didn’t know what that was) he’s super stoked about it saying how cool it was to have such a huge area like that, then informs me about spectator mode and we find a huge trial chamber. Also no idea what that was. Anyway. I spent the last several hours hanging out in this magical cave with all kinds of resources and cool things. This may not be as cool as we think it is but we agreed we should share with the world. In the same cave there’s a couple large amethyst areas too. Easily 10 stacks of amethyst blocks. Haven’t gone through the rest of the world. But here’s the seed

minecraft world seed -6336837653276724564