File:Chezhead Spawn Interp.png

Summary
Interpretation made by me of. Made after melo was unsure if lavacasts existed at spawn at that time.

Legend:
Green: Trees/Forest Red: Towers Orange: Bridge Purple: Platform Yellow: Wool Blue: Cobblestone Mass (1) Black: Cobblestone Mass (2)

I think the first cobblestone mass is a griefed base. The wool is evidence of this, could have been a part of the base, surviving the TNTing and burning. The second cobblestone mass seems to 'fat' to be an actual build, so is either a lavacast or some sort of dumping ground.