I broke one in an unconventional way one time.

Caught it plowing just a little tip sticking out. Came back later and started digging by hand (long before I had a skidloader or knew anybody with a hoe) kept digging and it kept getting bigger and wider. Started having water come up in the hole I had dug . Had to dig another hole by hand deeper than the first to drain the water into.

Finally got around the perimeter and could tell where the bottom was. I did not have anything to move it with and no way to handle it.  Rented a compressor and jackhammer and all it did was dull the point I could make no progress or even put a mark in it.

Figured if I could get it hot enough maybe water would break it.

Hauled brush, old wood, and anything else I could find about 7 or 8 wagon loads of stuff. Lit it and let it all burn down to nothing. Had several 5 gallon buckets of water which I threw on it. Lots of steam a little snap I thought well that was a wasted effort. 

Then I got to looking a little closer and could see a small crack took a couple wedges for felling trees and it split right apart along the crack.

Broke it in to 3 pieces and was finally able to drag them out of the hole. Was able to get a chain around the pieces enough to lift them with the 3 point a few inches off the ground to move them to a ravine where all the stones go.

Was a lot of work but I was  a lot younger then and was looking for the lowest cost solution.

Of course now I would have a friend with a trackhoe come and have it out in 5 minutes. You could always dig a deeper hole (12-14 ft deep beside it) and roll them into it too.