Title
I played for about 20 hours on a world with a test character when I bought the game, long story short, I wanted to restart once I had a fair knowledge of the game.
My first world I explored maybe ten burial chambers, the most I got from one was about 8 with most having anything from 0 - 5 on average.
I started a new world, and about 4 minutes run from spawn was the first burial chamber, this one was like nothing I had seen before, it was twice the size I had seen and had two rooms with stone ramps going up into other rooms, it had 3 mob spawners and i think about 4 of the surtling rooms and a few dotted in corridor ends.
In total whopping 19!!
I tried a google search on how many on average there are and couldnt find a definitive answer but most of the answers were less than ten.
Did I get ridiculously lucky? Curious as to how common this was, especially right near spawn.

My world in general though isnt as good as my first world, massive island but only meadows and black forest and on average so far much less burial caves close to spawn, but if you get 19 from one, who cares I guess!

EDIT

Not sure how world seeds work, I play single player and dont want anyone in/changing my world, I dont have the server button ticked so if its possible to share the seed without y world being affected I will post it tomorrow for anyone interested, if nothing else, it a great quick way to get cores in a pinch