I spent about 3 weeks taking an old rail line apart, unpaid. It was 'work for the doll' in Australia. The rail was gone but we had to take the big nail things out with huge wedges that look like the claw on a hammer. Had to knock them in with a normal hammer and then, I was on the big 10kg sledge hammer and had to hit down on it to knock the nail out. Sometimes it would shoot into the air like a bullet and everyone would bomb to get away from it.
Then, 2 weeks later I got to make big garden beds out of the old sleepers we recovered. Again, unpaid.