What version do u play on?Umm, between getting killed (very often), and finding all that stone, honestly, a couple years of playing every day.
I wish I could show it to you in detail! There are tunnels and railroads, huge rooms, halls, spiral stair ways, secret rooms, bridges, battlements and buttresses!
And everything would be accessible in survival!
(after looking at the image again) YOURE DOING THAT ON MOBILE OH MY GOODNESS