The bas relief of Stonewall Jackson, Jefferson David, and Robert E. Lee for 
which Stone Mountain Park is famous. It's the largest bas relief 
sculpture in the world.  It was created by the same person who would 
later carve Mountain Rushmore.  If you read the relief's history, 
it's a classic example of the funding troubles many large projects go 
through.  This one, after multiple stops and starts, took about fifty 
years to complete. <p />

Also, Stone Mountain is the largest piece of exposed granite in the
world.  Sadly, this is my only picture of it and it doesn't capture its
sheer mass.  In fact, I didn't appreciate the sheer mass of it until
later, as we drove out of Stone Mountain Park and got a distant view
from which I could see the whole monolith.  The base's circumference is
more than five miles.  I'm sorry I didn't take a picture of it from this
distant vantage point.