Rubble

Wood Rubble is the left over debris of an destroyed structure. Particularly one that was made using wood.

What does it do?
It remains in the exact spot that a structure used to be at. It is there for looks, or to show that a tribe's base/town was recently raided, or destroyed.

What does it drop?
Sometimes its drops can vary. It depends on which structure was there before it. It most commonly drops Log's or Sticks.