Friend and I started a project to build a 100×100 circular hole to bedrock. She laid the outline and I started and she abandoned me. We built the whole half covering a large hill so we had to level out the hill before we actually started digging. We thought it would be neat to leave all the veins we find to see what would be found.
I’ve discovered 3 spawners so far. Zombie, spider and skeleton. Have not found diamonds as I have not dug down far enough. I did dig a 1×1 hole in the Centre and TNT’d it to get an idea of where I am at with my hole and how much further I need to go.