Oh one more post for the Forbidden City, the Imperial Garden at the back of the city. :) They have the strangest rock collection in there and some of the oldest trees. I think the above is actually coral? The others will funky holes below are from some rock quarry that's only found in China.
You can see my dad in the corner of the photo above!
This is the view behind the Forbidden City outside the city walls, and that's the northwest corner tower in the distance.